#library
pacman::p_load(
tidyverse,data.table,tableone,tibble,stringi,readxl,dplyr,scales,ggsci,
skimr,Epi,janitor,summarytools,broom,easystats,car,rms)

#conflict解消
select<-dplyr::select 

library(pROC);library(glmnetUtils);library(glmnet);library(ISLR)
## Type 'citation("pROC")' for a citation.
## 
##  次のパッケージを付け加えます: 'pROC'
##  以下のオブジェクトは 'package:parameters' からマスクされています:
## 
##     ci
##  以下のオブジェクトは 'package:bayestestR' からマスクされています:
## 
##     auc, ci
##  以下のオブジェクトは 'package:stats' からマスクされています:
## 
##     cov, smooth, var
##  要求されたパッケージ Matrix をロード中です
## 
##  次のパッケージを付け加えます: 'Matrix'
##  以下のオブジェクトは 'package:tidyr' からマスクされています:
## 
##     expand, pack, unpack
## Loaded glmnet 4.1-8
## 
##  次のパッケージを付け加えます: 'glmnet'
##  以下のオブジェクトは 'package:glmnetUtils' からマスクされています:
## 
##     cv.glmnet, glmnet
#factor var
fac_var<-c("RANDID","SEX", "CURSMOKE", "DIABETES", "BPMEDS","educ","PREVCHD", "PREVAP", "PREVMI", "PREVSTRK", "PREVHYP", "PERIOD", "DEATH", 
           "ANGINA", "HOSPMI", "MI_FCHD", "ANYCHD", "STROKE", "CVD", "HYPERTEN")

cont_var<-c("TOTCHOL", "AGE", "SYSBP", "DIABP", "CIGPDAY", "BMI", "HEARTRTE", "GLUCOSE")

full_var<-c(fac_var[-c(1,6,12:20)],cont_var)

var<-c("SEX", "CURSMOKE", "DIABETES", "BPMEDS", "PREVCHD", "PREVAP", "PREVMI", "PREVHYP", cont_var) #PREVSTRは除外している

inter_var<-c("SEX:PREVCHD", "SEX:PREVAP", "SEX:PREVMI", "SEX:PREVHYP", "SEX:DIABP", "CURSMOKE:HEARTRTE","DIABETES:TOTCHOL", "DIABETES:SYSBP",
             "BPMEDS:PREVCHD", "BPMEDS:TOTCHOL", "BPMEDS:AGE", "PREVCHD:GLUCOSE", "PREVHYP:BMI", "TOTCHOL:AGE","HEARTRTE:GLUCOSE")

nonlin_term<-c("BMI","HEARTRTE","GLUCOSE")

#data import
fr<-read_csv("frmgham2.csv") %>% 
  mutate(across(fac_var,as.factor))
## Rows: 11627 Columns: 39
## ── Column specification ────────────────────────────────────────────────────────
## Delimiter: ","
## dbl (39): RANDID, SEX, TOTCHOL, AGE, SYSBP, DIABP, CURSMOKE, CIGPDAY, BMI, D...
## 
## ℹ Use `spec()` to retrieve the full column specification for this data.
## ℹ Specify the column types or set `show_col_types = FALSE` to quiet this message.
## Warning: There was 1 warning in `mutate()`.
## ℹ In argument: `across(fac_var, as.factor)`.
## Caused by warning:
## ! Using an external vector in selections was deprecated in tidyselect 1.1.0.
## ℹ Please use `all_of()` or `any_of()` instead.
##   # Was:
##   data %>% select(fac_var)
## 
##   # Now:
##   data %>% select(all_of(fac_var))
## 
## See <https://tidyselect.r-lib.org/reference/faq-external-vector.html>.
#欠測補完後データのimport
load("fr.missf.RData")
fr.missf<-fr.missf$ximp


#plot in baseline variable
fr_p1<-fr %>% 
  filter(PERIOD==1)

fr.missf_p1<-
  fr.missf %>% 
  filter(PERIOD==1)

full model formula

# full model formula
fullmodel<-
  paste0("STROKE~",
       str_c(var[!var %in% nonlin_term],collapse = "+"), #非線形以外のvarを+でつなぐ
       "+",
       str_c(paste0("rcs(",nonlin_term,",4)"),collapse = "+"), #非線形のvarを+でつなぐ
       "+",
       str_c(inter_var,collapse = "+")) #交互作用項を+でつなぐ

full model fitting results

# Complete case 
full_results<-
  glm(as.formula(fullmodel),data=fr_p1,
      family = binomial(link = "logit")) %>% 
  summary() %>% 
  .$coefficients %>% 
  as.data.frame() %>% 
  rownames_to_column() %>% 
  rename("var"="rowname") %>% 
  mutate(OR=exp(Estimate),
         Lower=exp(Estimate-1.96*`Std. Error`),
         Upper=exp(Estimate+1.96*`Std. Error`)) %>% 
  select(var,OR,Lower,Upper,"p"="Pr(>|z|)") %>% 
  #すべての変数を丸める
  mutate_if(is.numeric,~round(.,3))

full_results
##                           var      OR Lower    Upper     p
## 1                 (Intercept)   0.031 0.000   21.641 0.298
## 2                        SEX2   0.346 0.060    2.005 0.237
## 3                   CURSMOKE1   0.226 0.050    1.013 0.052
## 4                   DIABETES1  52.994 1.393 2015.673 0.032
## 5                     BPMEDS1 127.580 2.055 7920.611 0.021
## 6                    PREVCHD1   3.288 0.288   37.541 0.338
## 7                     PREVAP1   0.637 0.163    2.487 0.516
## 8                     PREVMI1   1.392 0.394    4.915 0.607
## 9                    PREVHYP1   5.301 1.053   26.683 0.043
## 10                    TOTCHOL   1.002 0.984    1.020 0.825
## 11                        AGE   1.085 1.003    1.174 0.043
## 12                      SYSBP   1.001 0.992    1.010 0.816
## 13                      DIABP   1.012 0.993    1.031 0.204
## 14                    CIGPDAY   1.003 0.988    1.018 0.677
## 15             rcs(BMI, 4)BMI   0.866 0.755    0.994 0.040
## 16            rcs(BMI, 4)BMI'   1.469 0.940    2.298 0.091
## 17           rcs(BMI, 4)BMI''   0.361 0.089    1.463 0.154
## 18   rcs(HEARTRTE, 4)HEARTRTE   1.013 0.967    1.062 0.585
## 19  rcs(HEARTRTE, 4)HEARTRTE'   0.787 0.658    0.940 0.008
## 20 rcs(HEARTRTE, 4)HEARTRTE''   1.856 1.179    2.923 0.008
## 21     rcs(GLUCOSE, 4)GLUCOSE   0.947 0.904    0.991 0.020
## 22    rcs(GLUCOSE, 4)GLUCOSE'   1.102 0.934    1.300 0.249
## 23   rcs(GLUCOSE, 4)GLUCOSE''   0.768 0.492    1.198 0.244
## 24              SEX2:PREVCHD1   0.720 0.020   26.534 0.858
## 25               SEX2:PREVAP1   2.493 0.082   75.953 0.600
## 26               SEX2:PREVMI1   2.786 0.106   73.500 0.539
## 27              SEX2:PREVHYP1   1.048 0.589    1.863 0.874
## 28                 SEX2:DIABP   1.011 0.989    1.033 0.329
## 29         CURSMOKE0:HEARTRTE   0.976 0.957    0.996 0.017
## 30          DIABETES1:TOTCHOL   0.992 0.981    1.003 0.144
## 31            DIABETES1:SYSBP   0.992 0.975    1.011 0.413
## 32           BPMEDS1:PREVCHD1   0.463 0.105    2.038 0.309
## 33            BPMEDS1:TOTCHOL   0.993 0.983    1.003 0.153
## 34                BPMEDS1:AGE   0.957 0.904    1.013 0.133
## 35           PREVCHD0:GLUCOSE   1.013 0.991    1.036 0.249
## 36               PREVHYP0:BMI   1.044 0.985    1.107 0.144
## 37                TOTCHOL:AGE   1.000 1.000    1.000 0.816
## 38           HEARTRTE:GLUCOSE   1.000 1.000    1.001 0.069
#imputation data
full_results_mi<-
  glm(as.formula(fullmodel),data=fr.missf_p1,
      family = binomial(link = "logit")) %>% 
  summary() %>% 
  .$coefficients %>% 
  as.data.frame() %>% 
  rownames_to_column() %>% 
  rename("var"="rowname") %>% 
  mutate(OR=exp(Estimate),
         Lower=exp(Estimate-1.96*`Std. Error`),
         Upper=exp(Estimate+1.96*`Std. Error`)) %>% 
  select(var,OR,Lower,Upper,"p"="Pr(>|z|)") %>% 
  #すべての変数を丸める
  mutate_if(is.numeric,~round(.,3))

full_results_mi
##                           var      OR Lower    Upper     p
## 1                 (Intercept)   0.005 0.000    2.849 0.102
## 2                        SEX2   0.303 0.058    1.583 0.157
## 3                   CURSMOKE1   0.290 0.071    1.188 0.085
## 4                   DIABETES1  55.743 1.632 1903.573 0.026
## 5                     BPMEDS1 198.320 4.319 9106.958 0.007
## 6                    PREVCHD1   3.015 0.328   27.704 0.329
## 7                     PREVAP1   0.689 0.186    2.558 0.578
## 8                     PREVMI1   1.057 0.331    3.368 0.926
## 9                    PREVHYP1   4.549 0.974   21.246 0.054
## 10                    TOTCHOL   1.007 0.990    1.024 0.447
## 11                        AGE   1.106 1.027    1.192 0.008
## 12                      SYSBP   1.001 0.993    1.010 0.748
## 13                      DIABP   1.013 0.995    1.031 0.159
## 14                    CIGPDAY   1.003 0.988    1.017 0.718
## 15             rcs(BMI, 4)BMI   0.917 0.803    1.048 0.204
## 16            rcs(BMI, 4)BMI'   1.256 0.817    1.930 0.299
## 17           rcs(BMI, 4)BMI''   0.552 0.144    2.112 0.385
## 18   rcs(HEARTRTE, 4)HEARTRTE   1.010 0.965    1.056 0.681
## 19  rcs(HEARTRTE, 4)HEARTRTE'   0.809 0.683    0.958 0.014
## 20 rcs(HEARTRTE, 4)HEARTRTE''   1.721 1.120    2.645 0.013
## 21     rcs(GLUCOSE, 4)GLUCOSE   0.941 0.901    0.982 0.006
## 22    rcs(GLUCOSE, 4)GLUCOSE'   1.134 0.990    1.300 0.070
## 23   rcs(GLUCOSE, 4)GLUCOSE''   0.672 0.439    1.028 0.067
## 24              SEX2:PREVCHD1   0.638 0.021   19.464 0.797
## 25               SEX2:PREVAP1   2.654 0.100   70.232 0.559
## 26               SEX2:PREVMI1   3.705 0.165   83.060 0.409
## 27              SEX2:PREVHYP1   1.073 0.623    1.845 0.800
## 28                 SEX2:DIABP   1.012 0.992    1.033 0.240
## 29         CURSMOKE0:HEARTRTE   0.979 0.962    0.998 0.026
## 30          DIABETES1:TOTCHOL   0.993 0.983    1.004 0.217
## 31            DIABETES1:SYSBP   0.989 0.972    1.006 0.192
## 32           BPMEDS1:PREVCHD1   0.434 0.108    1.743 0.239
## 33            BPMEDS1:TOTCHOL   0.991 0.982    1.001 0.070
## 34                BPMEDS1:AGE   0.957 0.907    1.009 0.107
## 35           PREVCHD0:GLUCOSE   1.010 0.991    1.030 0.299
## 36               PREVHYP0:BMI   1.038 0.982    1.098 0.187
## 37                TOTCHOL:AGE   1.000 1.000    1.000 0.428
## 38           HEARTRTE:GLUCOSE   1.000 1.000    1.001 0.045
full_results_mi %>% 
  ggplot(aes(y=var,x=OR))+
  geom_point()+
  geom_errorbar(aes(xmin=Lower,xmax=Upper),width=0.2)+
  geom_vline(xintercept=1,color="red")

ORが異常に幅広くなっている因子があるため、sparse data biasがかかっている可能性が高い →penalized regressionを行うか、モデル式の変更をすべき状態

Backwards stepwiseとElastic Netによるパラメータ推定を行う

Elastic Netによるパラメータ推定

下準備

# install.packages("glmnet")
# install.packages("ISLR")
# install.packages("glmnetUtils")
# library(glmnetUtils);library(glmnet);library(ISLR)

Ridge regression

#to detect optimal lambda
ridge.cv.res<-
  cv.glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=0)   #ridge

plot(ridge.cv.res) 

ridge.cv.res$lambda.min #min lambda
## [1] 0.009523244
# model coefficient with min lambda
glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  lambda=ridge.cv.res$lambda.min,
  alpha=0) %>% 
  .$beta
## 16 x 1 sparse Matrix of class "dgCMatrix"
##                     s0
## SEX      -0.0813962421
## CURSMOKE  0.2468760397
## DIABETES  0.7155327927
## BPMEDS    0.5592037443
## PREVCHD   0.3002169372
## PREVAP   -0.2447784453
## PREVMI    0.0955726098
## PREVHYP   0.5155415106
## TOTCHOL  -0.0011747152
## AGE       0.0604815428
## SYSBP     0.0041215475
## DIABP     0.0149010624
## CIGPDAY   0.0040394071
## BMI       0.0159035694
## HEARTRTE -0.0102841712
## GLUCOSE  -0.0009616904

Lasso regression

#to detect optimal lambda
lasso.cv.res<-
  cv.glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=1)   #lasso

#log lambdaとdevianceの関連性plot
plot(lasso.cv.res)

#devianceが最小のときのlambda
lasso.cv.res$lambda.min #min lambda
## [1] 0.0021
#min lambdaのもとでのlasso regression coefficient;二通りのcodeがあるが、結果は同じ

coef(lasso.cv.res,s="lambda.min") #interceptの値も表示される
## 17 x 1 sparse Matrix of class "dgCMatrix"
##                        s1
## (Intercept) -9.3732919829
## SEX         -0.0405473179
## CURSMOKE     0.2688147316
## DIABETES     0.6136939222
## BPMEDS       0.5142181504
## PREVCHD      0.0298690706
## PREVAP       .           
## PREVMI       0.1240355798
## PREVHYP      0.5511057332
## TOTCHOL     -0.0008671472
## AGE          0.0671689119
## SYSBP        0.0012846234
## DIABP        0.0178463734
## CIGPDAY      0.0025925936
## BMI          0.0112364738
## HEARTRTE    -0.0092393943
## GLUCOSE      .
glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  lambda=lasso.cv.res$lambda.min,
  alpha=1) %>% 
  .$beta 
## 16 x 1 sparse Matrix of class "dgCMatrix"
##                    s0
## SEX      -0.040476551
## CURSMOKE  0.268983024
## DIABETES  0.613718984
## BPMEDS    0.514118152
## PREVCHD   0.029927580
## PREVAP    .          
## PREVMI    0.123893960
## PREVHYP   0.551330129
## TOTCHOL  -0.000867187
## AGE       0.067179689
## SYSBP     0.001277099
## DIABP     0.017852439
## CIGPDAY   0.002589202
## BMI       0.011237120
## HEARTRTE -0.009239599
## GLUCOSE   .

Elastic Net

alphaを定める

Elastic Netでは、Ridge,Lassoの罰則項を割合alphaで混ぜ合わせる事ができる 当てはまりが最も良い時の最適なalpha求める

#cv.glmnetではなく、cv"a".glmnetを使う; to examine optimal alpha and lambda
elastic.cv.res<-
  cva.glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial"
  ) 

plot(elastic.cv.res)

 #alphaをデフォルトでは0-1の間で11個に振り分け、それぞれでのdevianceとlambdaの関係性を求める

#各alphaのうち、最もDevianceが小さいときのalphaを探し、その中で最も小さいlambdaを探す
##alpha=1はlassoと同じ;alpha=0はRidgeと同じということになる

sapply(elastic.cv.res$modlist,"[[","cvm") %>% #各alphaにおけるcvmを取り出す
  sapply(min) %>% #各alphaの中で最小の値を取り出す
  min() #すべてのalphaの中で最小のcvmを取り出す
## [1] 0.55716
#結果を踏まえると、alpha=1のとき最小の値を示しており、すなわちlassoが最適と考えられる

#alpha=1のときの最小のlamdaを求める
cv.glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=1
  ) %>% 
  .$lambda.min
## [1] 0.001588573
 #これは一個前のchankのlamda minと同じ値になる


attributes(elastic.cv.res)
## $names
## [1] "alpha"   "nfolds"  "modlist" "call"   
## 
## $class
## [1] "cva.glmnet"
#minlossplot(elastic.cv.res)

最適な(α,λ)は(1,0.001913442)であり、lasso regressionが良いということになる →これは間違っていそう。binomial devianceが最小のときのα、λのセットを選べていないかも →

ということで、更に再検討 Grid search ref: https://asmquantmacro.com/2016/04/26/fitting-elastic-net-model-in-r/

#install.packages("caret")
library(caret)
##  要求されたパッケージ lattice をロード中です
## 
##  次のパッケージを付け加えます: 'caret'
##  以下のオブジェクトは 'package:parameters' からマスクされています:
## 
##     compare_models
##  以下のオブジェクトは 'package:purrr' からマスクされています:
## 
##     lift

Grid Searchの準備

#develop grid search frame work
lambda.grid<-10^seq(2, -2, length=100)
alpha.grid<-seq(0, 1, len = 11)^3 #alphaの分割回数(cva.glmnetと同じに合わせた)

srchGrd<-expand.grid(alpha=alpha.grid,lambda=lambda.grid) #alpha 11個、lambda 100個の組み合わせを作る;計1100行


#Grid search with Cross validation
trnCntrl<-
  trainControl(method = "repeatedcv", #bootstrapも可能
               number=10, #fold数
               repeats=5,
               search="grid") #random searchも可能

#perform Cross validation 
set.seed(2024)
grid.res<-
  train(x=fr.missf_p1[,var] %>% data.matrix(),
      y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
      data=fr.missf_p1,
      method="glmnet", #method list is in http://topepo.github.io/caret/train-models-by-tag.html
      #metric="RMSE",#value to determine optimal parameter 
      tuneGrid=srchGrd, #grid search framework
      trControl=trnCntrl #searching method condition.
      )

plot(grid.res)

#得られた結果から任意の項目を抽出する項目名の指定
attributes(grid.res) 
## $names
##  [1] "method"       "modelInfo"    "modelType"    "results"      "pred"        
##  [6] "bestTune"     "call"         "dots"         "metric"       "control"     
## [11] "finalModel"   "preProcess"   "trainingData" "ptype"        "resample"    
## [16] "resampledCM"  "perfNames"    "maximize"     "yLimits"      "times"       
## [21] "levels"      
## 
## $class
## [1] "train"
#accuracy最適なときのalpha, lambda
grid.res$bestTune
##    alpha    lambda
## 28     0 0.1232847
grid.res$results
##      alpha       lambda  Accuracy         Kappa  AccuracySD      KappaSD
## 1    0.000   0.01000000 0.9061354  1.088097e-02 0.002272464 0.0231936150
## 2    0.000   0.01097499 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 3    0.000   0.01204504 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 4    0.000   0.01321941 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 5    0.000   0.01450829 0.9062256  1.181208e-02 0.002236353 0.0234894941
## 6    0.000   0.01592283 0.9062256  1.181208e-02 0.002236353 0.0234894941
## 7    0.000   0.01747528 0.9062256  1.181208e-02 0.002236353 0.0234894941
## 8    0.000   0.01917910 0.9062707  1.189718e-02 0.002147844 0.0234213703
## 9    0.000   0.02104904 0.9062255  1.034582e-02 0.002146289 0.0216204550
## 10   0.000   0.02310130 0.9062255  1.034582e-02 0.002146289 0.0216204550
## 11   0.000   0.02535364 0.9062708  9.670396e-03 0.001992461 0.0210364255
## 12   0.000   0.02782559 0.9063158  8.994152e-03 0.001945444 0.0206199572
## 13   0.000   0.03053856 0.9063158  8.236576e-03 0.001891483 0.0200397462
## 14   0.000   0.03351603 0.9063158  8.236576e-03 0.001891483 0.0200397462
## 15   0.000   0.03678380 0.9063158  8.236576e-03 0.001891483 0.0200397462
## 16   0.000   0.04037017 0.9063158  7.453662e-03 0.001778129 0.0193530744
## 17   0.000   0.04430621 0.9063158  7.453662e-03 0.001778129 0.0193530744
## 18   0.000   0.04862602 0.9063158  6.674133e-03 0.001718651 0.0186261584
## 19   0.000   0.05336699 0.9064060  6.851051e-03 0.001660926 0.0185389761
## 20   0.000   0.05857021 0.9064962  7.038989e-03 0.001595930 0.0186518966
## 21   0.000   0.06428073 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 22   0.000   0.07054802 0.9064963  6.281564e-03 0.001589830 0.0179241718
## 23   0.000   0.07742637 0.9064512  5.467220e-03 0.001527643 0.0150640003
## 24   0.000   0.08497534 0.9064513  3.923264e-03 0.001451245 0.0131545349
## 25   0.000   0.09326033 0.9064513  3.923264e-03 0.001451245 0.0131545349
## 26   0.000   0.10235310 0.9065415  4.096896e-03 0.001295782 0.0130416236
## 27   0.000   0.11233240 0.9065415  3.339320e-03 0.001213262 0.0117864848
## 28   0.000   0.12328467 0.9065866  3.427854e-03 0.001203981 0.0117435073
## 29   0.000   0.13530478 0.9065415  2.559791e-03 0.001124287 0.0102356292
## 30   0.000   0.14849683 0.9064963  1.714023e-03 0.001132386 0.0084829470
## 31   0.000   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 32   0.000   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 33   0.000   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 34   0.000   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 35   0.000   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 36   0.000   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 37   0.000   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 38   0.000   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 39   0.000   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 40   0.000   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 41   0.000   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 42   0.000   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 43   0.000   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 44   0.000   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 45   0.000   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 46   0.000   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 47   0.000   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 48   0.000   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 49   0.000   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 50   0.000   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 51   0.000   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 52   0.000   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 53   0.000   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 54   0.000   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 55   0.000   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 56   0.000   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 57   0.000   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 58   0.000   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 59   0.000   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 60   0.000   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 61   0.000   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 62   0.000   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 63   0.000   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 64   0.000   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 65   0.000   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 66   0.000   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 67   0.000   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 68   0.000   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 69   0.000   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 70   0.000   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 71   0.000   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 72   0.000   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 73   0.000   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 74   0.000   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 75   0.000   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 76   0.000  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 77   0.000  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 78   0.000  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 79   0.000  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 80   0.000  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 81   0.000  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 82   0.000  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 83   0.000  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 84   0.000  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 85   0.000  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 86   0.000  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 87   0.000  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 88   0.000  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 89   0.000  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 90   0.000  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 91   0.000  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 92   0.000  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 93   0.000  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 94   0.000  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 95   0.000  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 96   0.000  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 97   0.000  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 98   0.000  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 99   0.000  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 100  0.000 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 101  0.001   0.01000000 0.9061354  1.088097e-02 0.002272464 0.0231936150
## 102  0.001   0.01097499 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 103  0.001   0.01204504 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 104  0.001   0.01321941 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 105  0.001   0.01450829 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 106  0.001   0.01592283 0.9062256  1.181208e-02 0.002236353 0.0234894941
## 107  0.001   0.01747528 0.9062256  1.181208e-02 0.002236353 0.0234894941
## 108  0.001   0.01917910 0.9062256  1.105122e-02 0.002141771 0.0230620373
## 109  0.001   0.02104904 0.9062255  1.034582e-02 0.002146289 0.0216204550
## 110  0.001   0.02310130 0.9062255  1.034582e-02 0.002146289 0.0216204550
## 111  0.001   0.02535364 0.9062708  9.670396e-03 0.001992461 0.0210364255
## 112  0.001   0.02782559 0.9062708  8.148193e-03 0.001939808 0.0200865050
## 113  0.001   0.03053856 0.9063158  8.236576e-03 0.001891483 0.0200397462
## 114  0.001   0.03351603 0.9063158  8.236576e-03 0.001891483 0.0200397462
## 115  0.001   0.03678380 0.9063610  8.321725e-03 0.001835233 0.0199753241
## 116  0.001   0.04037017 0.9063158  7.453662e-03 0.001778129 0.0193530744
## 117  0.001   0.04430621 0.9063158  7.453662e-03 0.001778129 0.0193530744
## 118  0.001   0.04862602 0.9063610  6.762667e-03 0.001718172 0.0185827872
## 119  0.001   0.05336699 0.9064060  6.851051e-03 0.001660926 0.0185389761
## 120  0.001   0.05857021 0.9064962  7.038989e-03 0.001595930 0.0186518966
## 121  0.001   0.06428073 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 122  0.001   0.07054802 0.9064963  6.281564e-03 0.001589830 0.0179241718
## 123  0.001   0.07742637 0.9064060  4.599157e-03 0.001461392 0.0140497368
## 124  0.001   0.08497534 0.9064513  3.923264e-03 0.001451245 0.0131545349
## 125  0.001   0.09326033 0.9064513  3.923264e-03 0.001451245 0.0131545349
## 126  0.001   0.10235310 0.9065415  4.096896e-03 0.001295782 0.0130416236
## 127  0.001   0.11233240 0.9065415  3.339320e-03 0.001213262 0.0117864848
## 128  0.001   0.12328467 0.9065866  3.427854e-03 0.001203981 0.0117435073
## 129  0.001   0.13530478 0.9065415  2.559791e-03 0.001124287 0.0102356292
## 130  0.001   0.14849683 0.9064963  1.714023e-03 0.001132386 0.0084829470
## 131  0.001   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 132  0.001   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 133  0.001   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 134  0.001   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 135  0.001   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 136  0.001   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 137  0.001   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 138  0.001   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 139  0.001   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 140  0.001   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 141  0.001   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 142  0.001   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 143  0.001   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 144  0.001   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 145  0.001   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 146  0.001   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 147  0.001   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 148  0.001   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 149  0.001   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 150  0.001   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 151  0.001   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 152  0.001   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 153  0.001   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 154  0.001   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 155  0.001   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 156  0.001   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 157  0.001   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 158  0.001   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 159  0.001   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 160  0.001   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 161  0.001   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 162  0.001   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 163  0.001   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 164  0.001   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 165  0.001   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 166  0.001   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 167  0.001   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 168  0.001   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 169  0.001   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 170  0.001   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 171  0.001   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 172  0.001   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 173  0.001   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 174  0.001   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 175  0.001   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 176  0.001  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 177  0.001  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 178  0.001  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 179  0.001  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 180  0.001  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 181  0.001  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 182  0.001  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 183  0.001  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 184  0.001  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 185  0.001  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 186  0.001  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 187  0.001  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 188  0.001  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 189  0.001  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 190  0.001  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 191  0.001  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 192  0.001  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 193  0.001  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 194  0.001  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 195  0.001  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 196  0.001  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 197  0.001  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 198  0.001  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 199  0.001  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 200  0.001 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 201  0.008   0.01000000 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 202  0.008   0.01097499 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 203  0.008   0.01204504 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 204  0.008   0.01321941 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 205  0.008   0.01450829 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 206  0.008   0.01592283 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 207  0.008   0.01747528 0.9062256  1.105122e-02 0.002141771 0.0230620373
## 208  0.008   0.01917910 0.9062255  1.034582e-02 0.002146289 0.0216204550
## 209  0.008   0.02104904 0.9062707  1.043440e-02 0.002098869 0.0215676921
## 210  0.008   0.02310130 0.9062256  9.588442e-03 0.002092654 0.0211172183
## 211  0.008   0.02535364 0.9063610  9.862215e-03 0.001997771 0.0211406162
## 212  0.008   0.02782559 0.9063610  9.104639e-03 0.001945262 0.0206076814
## 213  0.008   0.03053856 0.9063610  9.104639e-03 0.001945262 0.0206076814
## 214  0.008   0.03351603 0.9063610  9.104639e-03 0.001945262 0.0206076814
## 215  0.008   0.03678380 0.9063610  8.321725e-03 0.001835233 0.0199753241
## 216  0.008   0.04037017 0.9064061  8.410259e-03 0.001833650 0.0199274204
## 217  0.008   0.04430621 0.9064060  7.630580e-03 0.001722399 0.0192618766
## 218  0.008   0.04862602 0.9064060  6.851051e-03 0.001660926 0.0185389761
## 219  0.008   0.05336699 0.9064512  6.950605e-03 0.001657927 0.0186963496
## 220  0.008   0.05857021 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 221  0.008   0.06428073 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 222  0.008   0.07054802 0.9064512  5.467220e-03 0.001527643 0.0150640003
## 223  0.008   0.07742637 0.9063609  3.731094e-03 0.001390496 0.0128968321
## 224  0.008   0.08497534 0.9064513  3.923264e-03 0.001451245 0.0131545349
## 225  0.008   0.09326033 0.9065415  4.096896e-03 0.001295782 0.0130416236
## 226  0.008   0.10235310 0.9065866  3.427854e-03 0.001203981 0.0117435073
## 227  0.008   0.11233240 0.9065866  3.427854e-03 0.001203981 0.0117435073
## 228  0.008   0.12328467 0.9065415  2.559791e-03 0.001124287 0.0102356292
## 229  0.008   0.13530478 0.9064963  1.714023e-03 0.001132386 0.0084829470
## 230  0.008   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 231  0.008   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 232  0.008   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 233  0.008   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 234  0.008   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 235  0.008   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 236  0.008   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 237  0.008   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 238  0.008   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 239  0.008   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 240  0.008   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 241  0.008   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 242  0.008   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 243  0.008   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 244  0.008   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 245  0.008   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 246  0.008   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 247  0.008   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 248  0.008   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 249  0.008   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 250  0.008   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 251  0.008   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 252  0.008   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 253  0.008   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 254  0.008   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 255  0.008   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 256  0.008   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 257  0.008   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 258  0.008   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 259  0.008   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 260  0.008   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 261  0.008   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 262  0.008   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 263  0.008   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 264  0.008   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 265  0.008   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 266  0.008   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 267  0.008   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 268  0.008   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 269  0.008   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 270  0.008   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 271  0.008   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 272  0.008   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 273  0.008   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 274  0.008   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 275  0.008   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 278  0.008  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 279  0.008  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 280  0.008  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 281  0.008  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 282  0.008  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 283  0.008  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 284  0.008  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 285  0.008  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 286  0.008  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 287  0.008  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 288  0.008  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 289  0.008  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 290  0.008  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 291  0.008  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 292  0.008  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 293  0.008  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 294  0.008  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 295  0.008  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 296  0.008  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 297  0.008  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 298  0.008  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 299  0.008  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 300  0.008 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 301  0.027   0.01000000 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 302  0.027   0.01097499 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 303  0.027   0.01204504 0.9061806  1.096612e-02 0.002229593 0.0231280435
## 304  0.027   0.01321941 0.9062256  1.105122e-02 0.002141771 0.0230620373
## 305  0.027   0.01450829 0.9062256  1.105122e-02 0.002141771 0.0230620373
## 306  0.027   0.01592283 0.9063159  1.200787e-02 0.002143910 0.0233964351
## 307  0.027   0.01747528 0.9063158  1.130246e-02 0.002148429 0.0220081093
## 308  0.027   0.01917910 0.9063158  1.130246e-02 0.002148429 0.0220081093
## 309  0.027   0.02104904 0.9063610  1.064832e-02 0.002148264 0.0216959403
## 310  0.027   0.02310130 0.9063611  9.869417e-03 0.001992909 0.0209689648
## 311  0.027   0.02535364 0.9064061  9.957801e-03 0.001943769 0.0209167578
## 312  0.027   0.02782559 0.9064061  9.957801e-03 0.001943769 0.0209167578
## 313  0.027   0.03053856 0.9064513  1.004295e-02 0.001886873 0.0208478728
## 314  0.027   0.03351603 0.9064512  9.263271e-03 0.001778956 0.0202768221
## 315  0.027   0.03678380 0.9064512  8.483742e-03 0.001719507 0.0196575856
## 316  0.027   0.04037017 0.9064963  8.572276e-03 0.001715397 0.0196081593
## 317  0.027   0.04430621 0.9064513  6.957808e-03 0.001652059 0.0185031921
## 318  0.027   0.04862602 0.9064963  7.046192e-03 0.001589830 0.0184582386
## 319  0.027   0.05336699 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 320  0.027   0.05857021 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 321  0.027   0.06428073 0.9063609  3.731094e-03 0.001390496 0.0128968321
## 322  0.027   0.07054802 0.9064963  4.008362e-03 0.001302815 0.0130849567
## 323  0.027   0.07742637 0.9065866  4.185430e-03 0.001287096 0.0129975308
## 324  0.027   0.08497534 0.9065416  3.339470e-03 0.001288258 0.0117863840
## 325  0.027   0.09326033 0.9065415  2.559791e-03 0.001124287 0.0102356292
## 326  0.027   0.10235310 0.9064963  1.714023e-03 0.001132386 0.0084829470
## 327  0.027   0.11233240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 328  0.027   0.12328467 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 329  0.027   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 330  0.027   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 331  0.027   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 332  0.027   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 333  0.027   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 334  0.027   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 335  0.027   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 336  0.027   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 337  0.027   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 338  0.027   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 340  0.027   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 341  0.027   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 342  0.027   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 343  0.027   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 346  0.027   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 347  0.027   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 348  0.027   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 349  0.027   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 350  0.027   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 351  0.027   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 352  0.027   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 353  0.027   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 354  0.027   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 355  0.027   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 357  0.027   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 358  0.027   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 359  0.027   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 360  0.027   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 361  0.027   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 362  0.027   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 363  0.027   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 364  0.027   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 365  0.027   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 366  0.027   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 367  0.027   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 368  0.027   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 369  0.027   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 370  0.027   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 371  0.027   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 372  0.027   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 373  0.027   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 374  0.027   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 375  0.027   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 376  0.027  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 378  0.027  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 379  0.027  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 380  0.027  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 381  0.027  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 382  0.027  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 383  0.027  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 384  0.027  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 385  0.027  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 386  0.027  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 387  0.027  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 388  0.027  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 389  0.027  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 390  0.027  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 391  0.027  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 392  0.027  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 393  0.027  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 394  0.027  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 395  0.027  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 396  0.027  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 397  0.027  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 398  0.027  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 399  0.027  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 400  0.027 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 402  0.064   0.01097499 0.9063610  1.285383e-02 0.002148046 0.0237159144
## 403  0.064   0.01204504 0.9063610  1.285383e-02 0.002148046 0.0237159144
## 404  0.064   0.01321941 0.9064060  1.295629e-02 0.002151211 0.0238339119
## 405  0.064   0.01450829 0.9064060  1.300159e-02 0.002151211 0.0225424198
## 406  0.064   0.01592283 0.9063611  1.141310e-02 0.002191502 0.0219846637
## 407  0.064   0.01747528 0.9064061  1.150149e-02 0.002146912 0.0219285264
## 408  0.064   0.01917910 0.9063611  9.869417e-03 0.001992909 0.0209689648
## 409  0.064   0.02104904 0.9063610  9.858247e-03 0.001945262 0.0207909087
## 410  0.064   0.02310130 0.9063610  9.858247e-03 0.001945262 0.0207909087
## 411  0.064   0.02535364 0.9064061  9.943396e-03 0.001889512 0.0207220228
## 412  0.064   0.02782559 0.9064512  9.252250e-03 0.001778956 0.0200921854
## 413  0.064   0.03053856 0.9064963  8.572276e-03 0.001715397 0.0196081593
## 414  0.064   0.03351603 0.9064964  7.825871e-03 0.001709724 0.0191759911
## 415  0.064   0.03678380 0.9064964  7.825871e-03 0.001709724 0.0191759911
## 416  0.064   0.04037017 0.9064963  7.046192e-03 0.001589830 0.0184582386
## 417  0.064   0.04430621 0.9064962  6.278128e-03 0.001460445 0.0179048296
## 418  0.064   0.04862602 0.9064962  5.552318e-03 0.001387414 0.0149943413
## 419  0.064   0.05336699 0.9064962  4.008161e-03 0.001310318 0.0130850891
## 420  0.064   0.05857021 0.9064513  2.382874e-03 0.001218210 0.0103178904
## 421  0.064   0.06428073 0.9064964  2.471407e-03 0.001212399 0.0102771793
## 422  0.064   0.07054802 0.9064963  1.714023e-03 0.001132386 0.0084829470
## 423  0.064   0.07742637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 424  0.064   0.08497534 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 425  0.064   0.09326033 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 429  0.064   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 430  0.064   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 431  0.064   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 432  0.064   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 439  0.064   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 440  0.064   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 441  0.064   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 442  0.064   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 443  0.064   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 445  0.064   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 446  0.064   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 447  0.064   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 448  0.064   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 449  0.064   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 450  0.064   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 451  0.064   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 452  0.064   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 453  0.064   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 454  0.064   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 455  0.064   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 456  0.064   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 457  0.064   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 458  0.064   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 459  0.064   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 460  0.064   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 461  0.064   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 462  0.064   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 463  0.064   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 464  0.064   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 465  0.064   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 466  0.064   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 467  0.064   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 468  0.064   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 469  0.064   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 470  0.064   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 471  0.064   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 472  0.064   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 473  0.064   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 474  0.064   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 475  0.064   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 486  0.064  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 487  0.064  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 488  0.064  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 492  0.064  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 493  0.064  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 494  0.064  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 495  0.064  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 496  0.064  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 497  0.064  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 498  0.064  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 499  0.064  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 500  0.064 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 502  0.125   0.01097499 0.9064061  1.225906e-02 0.002194602 0.0223473420
## 503  0.125   0.01204504 0.9063610  1.140193e-02 0.002148264 0.0218157061
## 504  0.125   0.01321941 0.9063610  1.140193e-02 0.002148264 0.0218157061
## 505  0.125   0.01450829 0.9062708  9.687908e-03 0.002094469 0.0209249372
## 506  0.125   0.01592283 0.9063610  9.858247e-03 0.001945262 0.0207909087
## 507  0.125   0.01747528 0.9063610  9.858247e-03 0.001945262 0.0207909087
## 508  0.125   0.01917910 0.9064964  1.013148e-02 0.001883127 0.0207945022
## 509  0.125   0.02104904 0.9064061  8.395358e-03 0.001776033 0.0197063825
## 510  0.125   0.02310130 0.9064512  8.483742e-03 0.001719507 0.0196575856
## 511  0.125   0.02535364 0.9064964  7.825871e-03 0.001709724 0.0191759911
## 512  0.125   0.02782559 0.9065415  7.914255e-03 0.001648414 0.0191285262
## 513  0.125   0.03053856 0.9064512  6.193030e-03 0.001594263 0.0179667139
## 514  0.125   0.03351603 0.9064962  6.278128e-03 0.001460445 0.0179048296
## 515  0.125   0.03678380 0.9064060  3.073668e-03 0.001312087 0.0119104917
## 516  0.125   0.04037017 0.9063609  2.205605e-03 0.001232634 0.0103966579
## 517  0.125   0.04430621 0.9064061  1.514810e-03 0.001134027 0.0084537425
## 518  0.125   0.04862602 0.9063611 -8.838384e-05 0.001128015 0.0006249681
## 519  0.125   0.05336699 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 521  0.125   0.06428073 0.9064061  0.000000e+00 0.001038735 0.0000000000
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## 605  0.216   0.01450829 0.9064513  9.263421e-03 0.001830931 0.0202767189
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## 607  0.216   0.01747528 0.9064512  8.483742e-03 0.001719507 0.0196575856
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## 609  0.216   0.02104904 0.9064963  7.046192e-03 0.001589830 0.0184582386
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## 611  0.216   0.02535364 0.9064963  4.756074e-03 0.001453777 0.0164614212
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## 699  0.216  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 700  0.216 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 701  0.343   0.01000000 0.9064513  9.263421e-03 0.001830931 0.0202767189
## 702  0.343   0.01097499 0.9064061  8.395358e-03 0.001776033 0.0197063825
## 703  0.343   0.01204504 0.9064962  8.572126e-03 0.001659812 0.0196082607
## 704  0.343   0.01321941 0.9064512  7.726166e-03 0.001658209 0.0190273574
## 705  0.343   0.01450829 0.9064513  6.200232e-03 0.001588160 0.0177659385
## 706  0.343   0.01592283 0.9063610  4.479007e-03 0.001526446 0.0163251343
## 707  0.343   0.01747528 0.9063610  4.479007e-03 0.001526446 0.0163251343
## 708  0.343   0.01917910 0.9063609  2.205605e-03 0.001232634 0.0103966579
## 709  0.343   0.02104904 0.9062708 -2.654514e-04 0.001127638 0.0010613545
## 710  0.343   0.02310130 0.9063611 -8.838384e-05 0.001128015 0.0006249681
## 711  0.343   0.02535364 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 712  0.343   0.02782559 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 713  0.343   0.03053856 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 714  0.343   0.03351603 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 715  0.343   0.03678380 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 716  0.343   0.04037017 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 717  0.343   0.04430621 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 718  0.343   0.04862602 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 719  0.343   0.05336699 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 720  0.343   0.05857021 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 721  0.343   0.06428073 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 722  0.343   0.07054802 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 723  0.343   0.07742637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 724  0.343   0.08497534 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 725  0.343   0.09326033 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 726  0.343   0.10235310 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 727  0.343   0.11233240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 728  0.343   0.12328467 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 729  0.343   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 730  0.343   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 731  0.343   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 732  0.343   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 733  0.343   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 734  0.343   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 735  0.343   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 736  0.343   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 737  0.343   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 738  0.343   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 739  0.343   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 740  0.343   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 741  0.343   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 742  0.343   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 743  0.343   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 744  0.343   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 745  0.343   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 746  0.343   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 747  0.343   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 748  0.343   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 749  0.343   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 750  0.343   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 751  0.343   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 752  0.343   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 753  0.343   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 754  0.343   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 755  0.343   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 756  0.343   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 757  0.343   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 758  0.343   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 759  0.343   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 760  0.343   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 761  0.343   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 762  0.343   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 763  0.343   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 764  0.343   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 765  0.343   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 766  0.343   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 767  0.343   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 768  0.343   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 769  0.343   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 770  0.343   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 771  0.343   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 772  0.343   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 773  0.343   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 774  0.343   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 775  0.343   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 776  0.343  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 777  0.343  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 778  0.343  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 779  0.343  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 780  0.343  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 781  0.343  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 782  0.343  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 783  0.343  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 784  0.343  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 785  0.343  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 786  0.343  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 787  0.343  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 788  0.343  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 789  0.343  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 790  0.343  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 791  0.343  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 792  0.343  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 793  0.343  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 794  0.343  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 795  0.343  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 796  0.343  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 797  0.343  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 798  0.343  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 799  0.343  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 800  0.343 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 801  0.512   0.01000000 0.9064061  6.111698e-03 0.001591294 0.0178084460
## 802  0.512   0.01097499 0.9063610  4.479007e-03 0.001526446 0.0163251343
## 803  0.512   0.01204504 0.9063610  4.479007e-03 0.001526446 0.0163251343
## 804  0.512   0.01321941 0.9064512  3.941731e-03 0.001385496 0.0131943665
## 805  0.512   0.01450829 0.9062708 -2.654514e-04 0.001127638 0.0010613545
## 806  0.512   0.01592283 0.9062708 -2.654514e-04 0.001127638 0.0010613545
## 807  0.512   0.01747528 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 808  0.512   0.01917910 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 809  0.512   0.02104904 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 810  0.512   0.02310130 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 811  0.512   0.02535364 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 812  0.512   0.02782559 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 813  0.512   0.03053856 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 814  0.512   0.03351603 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 815  0.512   0.03678380 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 816  0.512   0.04037017 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 817  0.512   0.04430621 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 818  0.512   0.04862602 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 819  0.512   0.05336699 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 820  0.512   0.05857021 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 821  0.512   0.06428073 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 822  0.512   0.07054802 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 823  0.512   0.07742637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 824  0.512   0.08497534 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 825  0.512   0.09326033 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 826  0.512   0.10235310 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 827  0.512   0.11233240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 828  0.512   0.12328467 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 829  0.512   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 830  0.512   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 831  0.512   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 832  0.512   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 833  0.512   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 834  0.512   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 835  0.512   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 836  0.512   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 837  0.512   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 838  0.512   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 839  0.512   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 840  0.512   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 841  0.512   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 842  0.512   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 843  0.512   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 844  0.512   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 845  0.512   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 846  0.512   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 847  0.512   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 848  0.512   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 849  0.512   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 850  0.512   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 851  0.512   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 852  0.512   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 853  0.512   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 854  0.512   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 855  0.512   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 856  0.512   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 857  0.512   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 858  0.512   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 859  0.512   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 860  0.512   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 861  0.512   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 862  0.512   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 863  0.512   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 864  0.512   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 865  0.512   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 866  0.512   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 867  0.512   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 868  0.512   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 869  0.512   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 870  0.512   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 871  0.512   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 872  0.512   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 873  0.512   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 874  0.512   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 875  0.512   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 876  0.512  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 877  0.512  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 878  0.512  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 879  0.512  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 880  0.512  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 881  0.512  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 882  0.512  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 883  0.512  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 884  0.512  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 885  0.512  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 886  0.512  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 887  0.512  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 888  0.512  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 889  0.512  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 890  0.512  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 891  0.512  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 892  0.512  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 893  0.512  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 894  0.512  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 895  0.512  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 896  0.512  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 897  0.512  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 898  0.512  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 899  0.512  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 900  0.512 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 901  0.729   0.01000000 0.9062707  5.138766e-04 0.001224382 0.0063068401
## 902  0.729   0.01097499 0.9062708 -2.654514e-04 0.001127638 0.0010613545
## 903  0.729   0.01204504 0.9063159 -1.769176e-04 0.001128748 0.0008755156
## 904  0.729   0.01321941 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 905  0.729   0.01450829 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 906  0.729   0.01592283 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 907  0.729   0.01747528 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 908  0.729   0.01917910 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 909  0.729   0.02104904 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 910  0.729   0.02310130 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 911  0.729   0.02535364 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 912  0.729   0.02782559 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 913  0.729   0.03053856 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 914  0.729   0.03351603 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 915  0.729   0.03678380 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 916  0.729   0.04037017 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 917  0.729   0.04430621 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 918  0.729   0.04862602 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 919  0.729   0.05336699 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 920  0.729   0.05857021 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 921  0.729   0.06428073 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 922  0.729   0.07054802 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 923  0.729   0.07742637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 924  0.729   0.08497534 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 925  0.729   0.09326033 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 926  0.729   0.10235310 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 927  0.729   0.11233240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 928  0.729   0.12328467 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 929  0.729   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 930  0.729   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 931  0.729   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 932  0.729   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 933  0.729   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 934  0.729   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 935  0.729   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 936  0.729   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 937  0.729   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 938  0.729   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 939  0.729   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 940  0.729   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 941  0.729   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 942  0.729   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 943  0.729   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 944  0.729   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 945  0.729   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 946  0.729   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 947  0.729   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 948  0.729   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 949  0.729   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 950  0.729   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 951  0.729   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 952  0.729   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 953  0.729   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 954  0.729   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 955  0.729   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 956  0.729   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 957  0.729   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 958  0.729   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 959  0.729   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 960  0.729   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 961  0.729   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 962  0.729   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 963  0.729   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 964  0.729   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 965  0.729   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 966  0.729   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 967  0.729   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 968  0.729   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 969  0.729   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 970  0.729   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 971  0.729   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 972  0.729   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 973  0.729   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 974  0.729   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 975  0.729   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 976  0.729  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 977  0.729  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 978  0.729  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 979  0.729  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 980  0.729  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 981  0.729  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 982  0.729  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 983  0.729  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 984  0.729  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 985  0.729  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 986  0.729  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 987  0.729  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 988  0.729  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 989  0.729  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 990  0.729  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 991  0.729  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 992  0.729  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 993  0.729  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 994  0.729  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 995  0.729  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 996  0.729  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 997  0.729  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 998  0.729  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 999  0.729  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1000 0.729 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1001 1.000   0.01000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1002 1.000   0.01097499 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1003 1.000   0.01204504 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1004 1.000   0.01321941 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1005 1.000   0.01450829 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1006 1.000   0.01592283 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1007 1.000   0.01747528 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1008 1.000   0.01917910 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1009 1.000   0.02104904 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1010 1.000   0.02310130 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1011 1.000   0.02535364 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1012 1.000   0.02782559 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1013 1.000   0.03053856 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1014 1.000   0.03351603 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1015 1.000   0.03678380 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1016 1.000   0.04037017 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1017 1.000   0.04430621 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1018 1.000   0.04862602 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1019 1.000   0.05336699 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1020 1.000   0.05857021 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1021 1.000   0.06428073 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1022 1.000   0.07054802 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1023 1.000   0.07742637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1024 1.000   0.08497534 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1025 1.000   0.09326033 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1026 1.000   0.10235310 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1027 1.000   0.11233240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1028 1.000   0.12328467 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1029 1.000   0.13530478 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1030 1.000   0.14849683 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1031 1.000   0.16297508 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1032 1.000   0.17886495 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1033 1.000   0.19630407 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1034 1.000   0.21544347 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1035 1.000   0.23644894 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1036 1.000   0.25950242 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1037 1.000   0.28480359 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1038 1.000   0.31257158 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1039 1.000   0.34304693 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1040 1.000   0.37649358 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1041 1.000   0.41320124 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1042 1.000   0.45348785 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1043 1.000   0.49770236 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1044 1.000   0.54622772 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1045 1.000   0.59948425 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1046 1.000   0.65793322 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1047 1.000   0.72208090 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1048 1.000   0.79248290 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1049 1.000   0.86974900 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1050 1.000   0.95454846 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1051 1.000   1.04761575 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1052 1.000   1.14975700 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1053 1.000   1.26185688 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1054 1.000   1.38488637 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1055 1.000   1.51991108 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1056 1.000   1.66810054 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1057 1.000   1.83073828 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1058 1.000   2.00923300 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1059 1.000   2.20513074 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1060 1.000   2.42012826 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1061 1.000   2.65608778 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1062 1.000   2.91505306 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1063 1.000   3.19926714 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1064 1.000   3.51119173 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1065 1.000   3.85352859 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1066 1.000   4.22924287 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1067 1.000   4.64158883 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1068 1.000   5.09413801 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1069 1.000   5.59081018 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1070 1.000   6.13590727 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1071 1.000   6.73415066 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1072 1.000   7.39072203 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1073 1.000   8.11130831 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1074 1.000   8.90215085 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1075 1.000   9.77009957 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1076 1.000  10.72267222 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1077 1.000  11.76811952 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1078 1.000  12.91549665 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1079 1.000  14.17474163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1080 1.000  15.55676144 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1081 1.000  17.07352647 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1082 1.000  18.73817423 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1083 1.000  20.56512308 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1084 1.000  22.57019720 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1085 1.000  24.77076356 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1086 1.000  27.18588243 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1087 1.000  29.83647240 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1088 1.000  32.74549163 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1089 1.000  35.93813664 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1090 1.000  39.44206059 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1091 1.000  43.28761281 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1092 1.000  47.50810162 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1093 1.000  52.14008288 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1094 1.000  57.22367659 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1095 1.000  62.80291442 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1096 1.000  68.92612104 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1097 1.000  75.64633276 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1098 1.000  83.02175681 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1099 1.000  91.11627561 0.9064061  0.000000e+00 0.001038735 0.0000000000
## 1100 1.000 100.00000000 0.9064061  0.000000e+00 0.001038735 0.0000000000
coef(grid.res$finalModel,
     s=grid.res$bestTune$lambda) #最適なalpha, lambdaのもとでの回帰係数
## 17 x 1 sparse Matrix of class "dgCMatrix"
##                        s1
## (Intercept) -6.976642e+00
## SEX         -5.213194e-02
## CURSMOKE     6.053955e-02
## DIABETES     3.924487e-01
## BPMEDS       4.669276e-01
## PREVCHD      1.658391e-01
## PREVAP       6.559511e-02
## PREVMI       1.711201e-01
## PREVHYP      3.117723e-01
## TOTCHOL     -7.454905e-05
## AGE          2.562016e-02
## SYSBP        5.841279e-03
## DIABP        8.863818e-03
## CIGPDAY      1.484293e-03
## BMI          1.200504e-02
## HEARTRTE    -3.768294e-03
## GLUCOSE      6.241628e-04

Lasso model (再掲)

cva.glmnetで求めた最適なalpha, lamdaのモデル

lasso.cv.res<-
  cv.glmnet(
  x=fr.missf_p1[,var] %>% data.matrix(),
  y=fr.missf_p1[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=1) 

coef(lasso.cv.res,s="lambda.min") 
## 17 x 1 sparse Matrix of class "dgCMatrix"
##                        s1
## (Intercept) -9.4090042597
## SEX         -0.0421977679
## CURSMOKE     0.2735297679
## DIABETES     0.6209602182
## BPMEDS       0.5182370318
## PREVCHD      0.0312762345
## PREVAP       .           
## PREVMI       0.1297005059
## PREVHYP      0.5534816855
## TOTCHOL     -0.0009247672
## AGE          0.0675262370
## SYSBP        0.0012615861
## DIABP        0.0179817879
## CIGPDAY      0.0027332234
## BMI          0.0116862895
## HEARTRTE    -0.0094909742
## GLUCOSE      .
cf<-coef(lasso.cv.res,s="lambda.min") %>% 
  as.matrix() %>% 
  as.data.frame() %>% 
  mutate(exp=exp(s1)) %>% 
  add_rownames(var="var") 
## Warning: `add_rownames()` was deprecated in dplyr 1.0.0.
## ℹ Please use `tibble::rownames_to_column()` instead.
## Call `lifecycle::last_lifecycle_warnings()` to see where this warning was
## generated.
#plot
cf %>% 
 ggplot(aes(y=var,x=exp))+
  geom_point()+
  geom_vline(xintercept=1,color="red")

  • Lasso regressionでは一部の変数の回帰係数が0にshrinkageしており、実質的に変数選択が行われたことがわかる
  • Shrinkageしたのは、PREVAP, GLUCOSEであり、これらは予測寄与が低いことを意味する

Grid searchによるalpha, labdaの最適化を図ったときのモデル

cf2<-
  coef(grid.res$finalModel,
     s=grid.res$bestTune$lambda) %>% 
  as.matrix() %>% 
  as.data.frame() %>% 
  mutate(exp=exp(s1)) %>% 
  add_rownames(var="var") 
## Warning: `add_rownames()` was deprecated in dplyr 1.0.0.
## ℹ Please use `tibble::rownames_to_column()` instead.
## Call `lifecycle::last_lifecycle_warnings()` to see where this warning was
## generated.
#plot
cf2 %>% 
 ggplot(aes(y=var,x=exp))+
  geom_point()+
  geom_vline(xintercept=1,color="red")

  • cva.glmnetと大きくは変わらない結果となった
  • 予測寄与度の高い因子も変わらず
  • Glucoseなど予測寄与度の低い因子は完全に0にshrinkはしなかったが実質効果なし(OR=1)に近似している

Lasso modelを使った予測性能評価

fr.missf_p1$lasso<-
  predict(lasso.cv.res,
        s="lambda.min",
        newx=fr.missf_p1[,var] %>% data.matrix(),
        type="response"
        ) 

fr.missf_p1<-
  fr.missf_p1 %>% 
  mutate(STROKEn=as.numeric(STROKE)-1)

ROC curve

#ROC curve
roc.lasso<-
  roc(STROKEn~lasso,
    data=fr.missf_p1,
    ci=T)
## Setting levels: control = 0, case = 1
## Warning in roc.default(response, predictors[, 1], ...): Deprecated use a matrix
## as predictor. Unexpected results may be produced, please pass a numeric vector.
## Setting direction: controls < cases
roc.lasso
## 
## Call:
## roc.formula(formula = STROKEn ~ lasso, data = fr.missf_p1, ci = T)
## 
## Data: lasso in 4019 controls (STROKEn 0) < 415 cases (STROKEn 1).
## Area under the curve: 0.7515
## 95% CI: 0.7276-0.7753 (DeLong)
roc.lasso %>% 
  ggroc(legacy.axes=T)+
  geom_segment(aes(x = 0, xend = 1, y = 0, yend = 1), color="grey", linetype="dashed")

- AUC=0.7514547と中等度の予測性能

Calibration plot

val.prob(
  p=fr.missf_p1$lasso,
  y=fr.missf_p1$STROKEn,
  g=10,
  cex=0.5
)

##           Dxy       C (ROC)            R2             D      D:Chi-sq 
##   0.502857211   0.751428606   0.148173033   0.070828019 315.051435537 
##           D:p             U      U:Chi-sq           U:p             Q 
##            NA  -0.000268482   0.809550747   0.667126648   0.071096501 
##         Brier     Intercept         Slope          Emax           E90 
##   0.077920351   0.111304815   1.056365459   0.009301043   0.008167332 
##          Eavg           S:z           S:p 
##   0.004960714  -0.128408818   0.897825453
  • Calibration性能はかなり高い事がわかる

BootstrapによるLasso modelの内的妥当性検証

optimismの算出

B<-100 #number of resampling 
N<-dim(fr.missf_p1)[1] #dataのdimentionを返す→4434行x39列→そのうち一番目(4434)を取得しNとする
AUC.i1<-AUC.i2<-numeric(B) 

for(i in 1:B){  

  #bootstrap random sampling 
  bs.i<-sample(1:N,N,replace=TRUE) #重複を許して1~4434までの数を4434回サンプリングする
  
  #bootstrap samplingに基づき、dataから集団を再構成 →data.iとする
  fr.missf_p1.i<-fr.missf_p1[bs.i,] 
  
  #bootstrapしたデータセットごとで回帰モデル構築→各bootstrap dataからリスク予測確率の算出→data2.1のprob_1列に格納
  lasso.cv.res.i<-
  cv.glmnet(
  x=fr.missf_p1.i[,var] %>% data.matrix(),
  y=fr.missf_p1.i[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=1) 
  
  fr.missf_p1.i$lasso1<- #lasso1では、bootstrap dataから構築した新しいLasso回帰モデルを使い、そのbootstrap dataに対するリスク予測確率を格納
  predict(lasso.cv.res.i,
        s="lambda.min",
        newx=fr.missf_p1.i[,var] %>% data.matrix(),
        type="response"
        )
  
  #AUCの算出;Bootstrap回数(B=100)分のAUCを算出して結果を格納;各bootstrap dataに対するAUC
  AUC.i1[i]<-roc(STROKEn~lasso1,data=fr.missf_p1.i)$auc 
  
  #bootstrapで作成した各回帰モデルを使って、オリジナルデータ(fr.missf_p1)に対するリスク予測確率を算出→fr.missf_p1のlasso2列に格納;AUC算出
  fr.missf_p1$lasso2<-
    predict(lasso.cv.res.i,
        s="lambda.min",
        newx=fr.missf_p1[,var] %>% data.matrix(),
        type="response"
        )
  
  AUC.i2[i]<-roc(STROKEn~lasso2,data=fr.missf_p1)$auc #ここで得られるAUCはbootstrap dataを用いてoriginal dataに外挿したときのAUC
  
  #print(paste(i,"th bootstrap iteration is completed.",sep="")) 
}  

opt1<-AUC.i1-AUC.i2 
#(bootstrap samplingした各data setを使い、それぞれ導いた回帰モデルにおけるAUC)ー(bootstrap samplingした各data setを使い、original dataに外挿したときのAUC)
summary(opt1);hist(opt1)
##      Min.   1st Qu.    Median      Mean   3rd Qu.      Max. 
## -0.031467 -0.002995  0.006353  0.006422  0.015910  0.034586

optimismを用いたbias corrected AUCの算出

lam1<-mean(opt1) #estimate of the optimism 

cor.AUC<-roc.lasso$auc-lam1 #bias corrected AUC estimate

cor.AUC
## [1] 0.7450327
  • Lasso modelによる予測モデル構築を行い、Bootstrapによるbias corrected AUCを算出したところ、0.7450327であった

**疑問 - 今回のモデルでは、事前に考えていた非線形性や交互作用項がモデリングに組み込まれなかったが、実際にはそれらの柔軟なモデリングをLassoに適用することはできるのか?交互作用項に関しては、ペアの変数の掛け算項を列結合すれば良さそうだが、非線形性はどのように表現すればよいのかわからない。

Cross validationによる内的妥当性の検証

#k-fold CV 
k <-5 
AUC_CV <-data.frame(matrix(ncol=2,nrow=k)) 

#Randomly shuffle the data 
fr.missf_p1.r<-fr.missf_p1[sample(nrow(fr.missf_p1)),] 
 
#Create k equally size folds 
folds <- cut(seq(1,nrow(fr.missf_p1.r)),breaks=k,labels=FALSE) 
 
#Perform k fold cross validation 
for(i in 1:k){  

  #Segment data2r by fold using the which() function  
testIndexes <- which(folds==i,arr.ind=TRUE) 
testData <- fr.missf_p1.r[testIndexes, ] 
trainData <- fr.missf_p1.r[-testIndexes, ] 

fit1<-
  cv.glmnet(
  x=trainData[,var] %>% data.matrix(),
  y=trainData[,"STROKE"] %>% data.matrix(),
  family="binomial",
  alpha=1) 

testData$fitted<-
  predict(lasso.cv.res,
        s="lambda.min",
        newx=testData[,var] %>% data.matrix(),
        type="response"
        ) 

ROC <- roc(testData$STROKE, testData$fitted) 
AUC_CV[i,2] <- ROC$auc 
AUC_CV[i,1] <- i 

#print(paste(i,"th cross-validation iteration is completed.", sep="")) 
}  
## Setting levels: control = 0, case = 1
## Warning in roc.default(testData$STROKE, testData$fitted): Deprecated use a
## matrix as predictor. Unexpected results may be produced, please pass a numeric
## vector.
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Warning in roc.default(testData$STROKE, testData$fitted): Deprecated use a
## matrix as predictor. Unexpected results may be produced, please pass a numeric
## vector.
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Warning in roc.default(testData$STROKE, testData$fitted): Deprecated use a
## matrix as predictor. Unexpected results may be produced, please pass a numeric
## vector.
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Warning in roc.default(testData$STROKE, testData$fitted): Deprecated use a
## matrix as predictor. Unexpected results may be produced, please pass a numeric
## vector.
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Warning in roc.default(testData$STROKE, testData$fitted): Deprecated use a
## matrix as predictor. Unexpected results may be produced, please pass a numeric
## vector.
## Setting direction: controls < cases
names(AUC_CV)[2] <- "AUC_cv" 
names(AUC_CV)[1] <- "k" 
print(summary(AUC_CV$AUC_cv)) 
##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##  0.7144  0.7307  0.7632  0.7497  0.7695  0.7705
  • CVによる内的妥当性検証ではAUCは0.7496755であり、Bootstrapによるbias corrected AUC=0.7450327と遜色ない。

Backward stepwiseによる変数選択とモデリング

ここでは、Lasso modelとの比較可能性を高めるために、2つの回帰モデルを考える 1. 交互作用項、非線形項を含まない線形の全変数モデル 2. 交互作用項、非線形項を含む全変数モデル(full model)

1. 交互作用項、非線形項を含まない線形の全変数モデルを考える(lin_model)

用いる変数はである

lin_form<-paste("STROKE~",paste(full_var,collapse="+"))

lin_model<-glm(as.formula(lin_form),
               data=fr.missf_p1,
               family=binomial(link="logit"))

VIFの検討

rms::vif(lin_model)
##      SEX2 CURSMOKE1 DIABETES1   BPMEDS1  PREVCHD1   PREVAP1   PREVMI1 PREVSTRK1 
##  1.245566  2.439088  1.694071  1.107002  9.598226  6.717491  2.379642  1.000000 
##  PREVHYP1   TOTCHOL       AGE     SYSBP     DIABP   CIGPDAY       BMI  HEARTRTE 
##  1.937207  1.067710  1.317387  3.700669  3.017425  2.568418  1.177581  1.100995 
##   GLUCOSE 
##  1.723184
  • PREVCHD、PREVAPのVIFが高く、多重共線性が疑われるため、PREVCHDを除外して再度VIFを算出
glm(STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + 
    PREVMI + PREVSTRK + PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + 
    CIGPDAY + BMI + HEARTRTE + GLUCOSE,
               data=fr.missf_p1,
               family=binomial(link="logit")) %>% 
  rms::vif()
##      SEX2 CURSMOKE1 DIABETES1   BPMEDS1   PREVAP1   PREVMI1 PREVSTRK1  PREVHYP1 
##  1.244364  2.439228  1.693826  1.106665  1.187531  1.164856  1.000000  1.935830 
##   TOTCHOL       AGE     SYSBP     DIABP   CIGPDAY       BMI  HEARTRTE   GLUCOSE 
##  1.067423  1.316767  3.695881  3.010815  2.568423  1.177247  1.100259  1.722415
  • 見事に各変数のVIFが低下したため、PREVCHDを除外したモデルを採用する(lin_model2)
lin_form2<-
  as.formula(STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + 
    PREVMI + PREVSTRK + PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + 
    CIGPDAY + BMI + HEARTRTE + GLUCOSE)
             
lin_model2<-glm(lin_form2,
               data=fr.missf_p1,
               family=binomial(link="logit"))  

Backwards stepwiseによる変数選択

step(lin_model2,
     direction="both") %>% 
  summary()
## Start:  AIC=2356.87
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + PREVMI + 
##     PREVSTRK + PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + 
##     BMI + HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - PREVAP    1   2322.9 2354.9
## - PREVMI    1   2322.9 2354.9
## - SYSBP     1   2322.9 2354.9
## - SEX       1   2323.1 2355.1
## - CIGPDAY   1   2323.4 2355.4
## - GLUCOSE   1   2323.5 2355.5
## - TOTCHOL   1   2323.6 2355.6
## - BMI       1   2324.6 2356.6
## <none>          2322.9 2356.9
## - BPMEDS    1   2326.4 2358.4
## - CURSMOKE  1   2326.5 2358.5
## - HEARTRTE  1   2327.9 2359.9
## - DIABETES  1   2329.9 2361.9
## - DIABP     1   2331.5 2363.5
## - PREVHYP   1   2333.0 2365.0
## - AGE       1   2412.6 2444.6
## - PREVSTRK  1   2438.7 2470.7
## 
## Step:  AIC=2354.87
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVSTRK + 
##     PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + BMI + 
##     HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - PREVMI    1   2322.9 2352.9
## - SYSBP     1   2322.9 2352.9
## - SEX       1   2323.1 2353.1
## - CIGPDAY   1   2323.4 2353.4
## - GLUCOSE   1   2323.5 2353.5
## - TOTCHOL   1   2323.6 2353.6
## - BMI       1   2324.6 2354.6
## <none>          2322.9 2354.9
## - BPMEDS    1   2326.4 2356.4
## - CURSMOKE  1   2326.5 2356.5
## + PREVAP    1   2322.9 2356.9
## - HEARTRTE  1   2328.0 2358.0
## - DIABETES  1   2329.9 2359.9
## - DIABP     1   2331.5 2361.5
## - PREVHYP   1   2333.0 2363.0
## - AGE       1   2413.8 2443.8
## - PREVSTRK  1   2438.8 2468.8
## 
## Step:  AIC=2352.88
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + BMI + HEARTRTE + 
##     GLUCOSE
## 
##            Df Deviance    AIC
## - SYSBP     1   2322.9 2350.9
## - SEX       1   2323.1 2351.1
## - CIGPDAY   1   2323.4 2351.4
## - GLUCOSE   1   2323.5 2351.5
## - TOTCHOL   1   2323.6 2351.6
## - BMI       1   2324.6 2352.6
## <none>          2322.9 2352.9
## - BPMEDS    1   2326.4 2354.4
## - CURSMOKE  1   2326.5 2354.5
## + PREVMI    1   2322.9 2354.9
## + PREVAP    1   2322.9 2354.9
## - HEARTRTE  1   2328.0 2356.0
## - DIABETES  1   2329.9 2357.9
## - DIABP     1   2331.5 2359.5
## - PREVHYP   1   2333.0 2361.0
## - AGE       1   2414.8 2442.8
## - PREVSTRK  1   2439.4 2467.4
## 
## Step:  AIC=2350.94
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     TOTCHOL + AGE + DIABP + CIGPDAY + BMI + HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - SEX       1   2323.2 2349.2
## - CIGPDAY   1   2323.5 2349.5
## - GLUCOSE   1   2323.5 2349.5
## - TOTCHOL   1   2323.7 2349.7
## - BMI       1   2324.7 2350.7
## <none>          2322.9 2350.9
## - CURSMOKE  1   2326.6 2352.6
## - BPMEDS    1   2326.6 2352.6
## + SYSBP     1   2322.9 2352.9
## + PREVMI    1   2322.9 2352.9
## + PREVAP    1   2322.9 2352.9
## - HEARTRTE  1   2328.0 2354.0
## - DIABETES  1   2330.0 2356.0
## - PREVHYP   1   2334.9 2360.9
## - DIABP     1   2339.6 2365.6
## - AGE       1   2427.5 2453.5
## - PREVSTRK  1   2439.5 2465.5
## 
## Step:  AIC=2349.15
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     TOTCHOL + AGE + DIABP + CIGPDAY + BMI + HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - GLUCOSE   1   2323.7 2347.7
## - CIGPDAY   1   2323.9 2347.9
## - TOTCHOL   1   2324.1 2348.1
## - BMI       1   2324.9 2348.9
## <none>          2323.2 2349.2
## - BPMEDS    1   2326.7 2350.7
## - CURSMOKE  1   2326.8 2350.8
## + SEX       1   2322.9 2350.9
## + SYSBP     1   2323.1 2351.1
## + PREVMI    1   2323.1 2351.1
## + PREVAP    1   2323.2 2351.2
## - HEARTRTE  1   2328.5 2352.5
## - DIABETES  1   2330.3 2354.3
## - PREVHYP   1   2335.1 2359.1
## - DIABP     1   2339.9 2363.9
## - AGE       1   2427.9 2451.9
## - PREVSTRK  1   2439.8 2463.8
## 
## Step:  AIC=2347.72
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     TOTCHOL + AGE + DIABP + CIGPDAY + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - CIGPDAY   1   2324.5 2346.5
## - TOTCHOL   1   2324.6 2346.6
## - BMI       1   2325.4 2347.4
## <none>          2323.7 2347.7
## + GLUCOSE   1   2323.2 2349.2
## - BPMEDS    1   2327.2 2349.2
## - CURSMOKE  1   2327.3 2349.3
## + SEX       1   2323.5 2349.5
## + PREVMI    1   2323.7 2349.7
## + SYSBP     1   2323.7 2349.7
## + PREVAP    1   2323.7 2349.7
## - HEARTRTE  1   2329.4 2351.4
## - DIABETES  1   2331.7 2353.7
## - PREVHYP   1   2335.6 2357.6
## - DIABP     1   2340.7 2362.7
## - AGE       1   2428.0 2450.0
## - PREVSTRK  1   2440.1 2462.1
## 
## Step:  AIC=2346.51
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     TOTCHOL + AGE + DIABP + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - TOTCHOL   1   2325.4 2345.4
## - BMI       1   2326.2 2346.2
## <none>          2324.5 2346.5
## + CIGPDAY   1   2323.7 2347.7
## - BPMEDS    1   2327.9 2347.9
## + GLUCOSE   1   2323.9 2347.9
## + SEX       1   2324.1 2348.1
## + PREVMI    1   2324.5 2348.5
## + SYSBP     1   2324.5 2348.5
## + PREVAP    1   2324.5 2348.5
## - HEARTRTE  1   2330.0 2350.0
## - DIABETES  1   2332.4 2352.4
## - PREVHYP   1   2336.3 2356.3
## - CURSMOKE  1   2339.1 2359.1
## - DIABP     1   2341.6 2361.6
## - AGE       1   2428.0 2448.0
## - PREVSTRK  1   2440.6 2460.6
## 
## Step:  AIC=2345.44
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     AGE + DIABP + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - BMI       1   2327.1 2345.1
## <none>          2325.4 2345.4
## + TOTCHOL   1   2324.5 2346.5
## + CIGPDAY   1   2324.6 2346.6
## - BPMEDS    1   2328.7 2346.7
## + SEX       1   2324.8 2346.8
## + GLUCOSE   1   2324.8 2346.8
## + PREVMI    1   2325.4 2347.4
## + PREVAP    1   2325.4 2347.4
## + SYSBP     1   2325.4 2347.4
## - HEARTRTE  1   2331.4 2349.4
## - DIABETES  1   2333.3 2351.3
## - PREVHYP   1   2337.1 2355.1
## - CURSMOKE  1   2340.3 2358.3
## - DIABP     1   2342.4 2360.4
## - AGE       1   2428.2 2446.2
## - PREVSTRK  1   2442.3 2460.3
## 
## Step:  AIC=2345.13
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + 
##     AGE + DIABP + HEARTRTE
## 
##            Df Deviance    AIC
## <none>          2327.1 2345.1
## + BMI       1   2325.4 2345.4
## + TOTCHOL   1   2326.2 2346.2
## + CIGPDAY   1   2326.3 2346.3
## - BPMEDS    1   2330.3 2346.3
## + SEX       1   2326.5 2346.5
## + GLUCOSE   1   2326.6 2346.6
## + PREVMI    1   2327.1 2347.1
## + PREVAP    1   2327.1 2347.1
## + SYSBP     1   2327.1 2347.1
## - HEARTRTE  1   2333.0 2349.0
## - DIABETES  1   2335.8 2351.8
## - PREVHYP   1   2339.5 2355.5
## - CURSMOKE  1   2340.9 2356.9
## - DIABP     1   2347.3 2363.3
## - AGE       1   2429.3 2445.3
## - PREVSTRK  1   2443.8 2459.8
## 
## Call:
## glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + 
##     PREVHYP + AGE + DIABP + HEARTRTE, family = binomial(link = "logit"), 
##     data = fr.missf_p1)
## 
## Deviance Residuals: 
##     Min       1Q   Median       3Q      Max  
## -1.3340  -0.4512  -0.3184  -0.2316   2.9566  
## 
## Coefficients:
##               Estimate Std. Error z value Pr(>|z|)    
## (Intercept)  -7.767033   0.667549 -11.635  < 2e-16 ***
## CURSMOKE1     0.427568   0.115490   3.702 0.000214 ***
## DIABETES1     0.750248   0.241140   3.111 0.001863 ** 
## BPMEDS1       0.407887   0.222002   1.837 0.066163 .  
## PREVSTRK1    17.571864 238.184327   0.074 0.941190    
## PREVHYP1      0.516553   0.146211   3.533 0.000411 ***
## AGE           0.071498   0.007278   9.823  < 2e-16 ***
## DIABP         0.023741   0.005264   4.510 6.49e-06 ***
## HEARTRTE     -0.011267   0.004715  -2.389 0.016872 *  
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## (Dispersion parameter for binomial family taken to be 1)
## 
##     Null deviance: 2756.0  on 4433  degrees of freedom
## Residual deviance: 2327.1  on 4425  degrees of freedom
## AIC: 2345.1
## 
## Number of Fisher Scoring iterations: 14
  • Backwardsの結果、glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + PREVHYP + AGE + DIABP + HEARTRTE, family = binomial(link = “logit”), data = fr.missf_p1) が最良のモデルとして選ばれた
stepwise_results<-
  glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVSTRK + 
    PREVHYP + AGE + DIABP + HEARTRTE, family = binomial(link = "logit"), 
    data = fr.missf_p1) %>% 
  summary() %>% 
  .$coefficients %>% 
  as.data.frame() %>% 
  rownames_to_column() %>% 
  rename("var"="rowname") %>% 
  mutate(OR=exp(Estimate),
         Lower=exp(Estimate-1.96*`Std. Error`),
         Upper=exp(Estimate+1.96*`Std. Error`)) %>% 
  select(var,OR,Lower,Upper,"p"="Pr(>|z|)") %>% 
  #すべての変数を丸める
  mutate_if(is.numeric,~round(.,3))

#結果を表示
stepwise_results
##           var          OR Lower         Upper     p
## 1 (Intercept) 0.00000e+00 0.000  2.000000e-03 0.000
## 2   CURSMOKE1 1.53400e+00 1.223  1.923000e+00 0.000
## 3   DIABETES1 2.11800e+00 1.320  3.397000e+00 0.002
## 4     BPMEDS1 1.50400e+00 0.973  2.323000e+00 0.066
## 5   PREVSTRK1 4.27921e+07 0.000 2.387569e+210 0.941
## 6    PREVHYP1 1.67600e+00 1.259  2.233000e+00 0.000
## 7         AGE 1.07400e+00 1.059  1.090000e+00 0.000
## 8       DIABP 1.02400e+00 1.014  1.035000e+00 0.000
## 9    HEARTRTE 9.89000e-01 0.980  9.980000e-01 0.017
#plot
stepwise_results %>% 
  #filter(!var=="PREVSTRK1") %>%  #これだけ非常にCIが大きくグラフ化すると視認性が悪いので一時的に削除
  ggplot(aes(y=var,x=OR))+
  geom_point()+
  geom_errorbar(aes(xmin=Lower,xmax=Upper),width=0.2)+
  geom_vline(xintercept=1,color="red")

- 変数選択の結果残った変数のうち、PREVSTRKのORが非常に大きくなり、推定が不安定になっている - アウトカムとPREVSTROKEの関係を詳しく見てみると、分割表において、 4019, 383, 0, 32  であり、STROKE=0のとき、PREVSTRK=1に該当する患者が0であることがわかった→これがsparse biasの原因である

xtabs(~STROKE+PREVSTRK,
      data=fr.missf_p1)
##       PREVSTRK
## STROKE    0    1
##      0 4019    0
##      1  383   32

ここで、すべてのカテゴリカル変数に対して同様にアウトカムとの分割表を考えてみる

f<-
  function(x){
form<-as.formula(paste("~STROKE+",x))  
xtabs(form,data=fr.missf_p1)
  }

for(i in fac_var[-1]){
  print(f(i))
}
##       SEX
## STROKE    1    2
##      0 1751 2268
##      1  193  222
##       CURSMOKE
## STROKE    0    1
##      0 2037 1982
##      1  216  199
##       DIABETES
## STROKE    0    1
##      0 3926   93
##      1  387   28
##       BPMEDS
## STROKE    0    1
##      0 3917  102
##      1  373   42
##       educ
## STROKE    1    2    3    4
##      0 1659 1206  676  478
##      1  224  104   52   35
##       PREVCHD
## STROKE    0    1
##      0 3862  157
##      1  378   37
##       PREVAP
## STROKE    0    1
##      0 3899  120
##      1  388   27
##       PREVMI
## STROKE    0    1
##      0 3949   70
##      1  399   16
##       PREVSTRK
## STROKE    0    1
##      0 4019    0
##      1  383   32
##       PREVHYP
## STROKE    0    1
##      0 2840 1179
##      1  164  251
##       PERIOD
## STROKE    1    2    3
##      0 4019    0    0
##      1  415    0    0
##       DEATH
## STROKE    0    1
##      0 2746 1273
##      1  138  277
##       ANGINA
## STROKE    0    1
##      0 3394  625
##      1  315  100
##       HOSPMI
## STROKE    0    1
##      0 3636  383
##      1  344   71
##       MI_FCHD
## STROKE    0    1
##      0 3398  621
##      1  305  110
##       ANYCHD
## STROKE    0    1
##      0 2958 1061
##      1  236  179
## STROKE
##    0    1 
## 4019  415 
##       CVD
## STROKE    0    1
##      0 3277  742
##      1    0  415
##       HYPERTEN
## STROKE    0    1
##      0 1142 2877
##      1   40  375
  • カテゴリカル変数に対してアウトカムとの分割表を考えてみると、sparseな部分が可視化できるため、事前の変数選択を考える上で非常に有用であることがわかった
  • 今回は、PREVSTRKのみが完全にsparse(cell=0がある)であるため、この変数を除外して再度変数選択を行うこととする(本当はこれを解析前にできればよかった)

PREVSTROKEを除外したモデルにおいて、VIFから再度検討する

glm(
  STROKE~ SEX+CURSMOKE+DIABETES+BPMEDS+PREVCHD+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+BMI+HEARTRTE+GLUCOSE,
               data=fr.missf_p1,
               family=binomial(link="logit")) %>% 
  rms::vif()
##      SEX2 CURSMOKE1 DIABETES1   BPMEDS1  PREVCHD1   PREVAP1   PREVMI1  PREVHYP1 
##  1.240065  2.456395  1.705096  1.112819  8.979822  5.835302  2.735766  1.922086 
##   TOTCHOL       AGE     SYSBP     DIABP   CIGPDAY       BMI  HEARTRTE   GLUCOSE 
##  1.066603  1.317287  3.664247  2.980477  2.583968  1.182116  1.101576  1.730470
#ココでも同様にPREVCHDのVIFが高いため、除外して再度VIFを算出
glm(
  STROKE~ SEX+CURSMOKE+DIABETES+BPMEDS+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+BMI+HEARTRTE+GLUCOSE,
               data=fr.missf_p1,
               family=binomial(link="logit")) %>% 
  rms::vif()
##      SEX2 CURSMOKE1 DIABETES1   BPMEDS1   PREVAP1   PREVMI1  PREVHYP1   TOTCHOL 
##  1.240237  2.456599  1.705139  1.112127  1.179417  1.159379  1.919544  1.065887 
##       AGE     SYSBP     DIABP   CIGPDAY       BMI  HEARTRTE   GLUCOSE 
##  1.316273  3.658322  2.971481  2.583932  1.181654  1.100465  1.729751
#いい感じ→これを初期モデルとする

lin_model3<-
  glm(STROKE~ SEX+CURSMOKE+DIABETES+BPMEDS+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+BMI+HEARTRTE+GLUCOSE,
               data=fr.missf_p1,
               family=binomial(link="logit"))
step(lin_model3,
     direction="both") %>% 
  summary()
## Start:  AIC=2470.74
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + PREVMI + 
##     PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + BMI + 
##     HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - PREVAP    1   2438.8 2468.8
## - SYSBP     1   2438.8 2468.8
## - SEX       1   2439.0 2469.0
## - CIGPDAY   1   2439.1 2469.1
## - GLUCOSE   1   2439.1 2469.1
## - PREVMI    1   2439.4 2469.4
## - TOTCHOL   1   2440.2 2470.2
## - BMI       1   2440.3 2470.3
## <none>          2438.7 2470.7
## - CURSMOKE  1   2442.3 2472.3
## - DIABETES  1   2445.2 2475.2
## - HEARTRTE  1   2445.4 2475.4
## - BPMEDS    1   2445.7 2475.7
## - DIABP     1   2446.6 2476.6
## - PREVHYP   1   2453.2 2483.2
## - AGE       1   2532.4 2562.4
## 
## Step:  AIC=2468.82
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + BMI + HEARTRTE + 
##     GLUCOSE
## 
##            Df Deviance    AIC
## - SYSBP     1   2438.9 2466.9
## - SEX       1   2439.1 2467.1
## - CIGPDAY   1   2439.1 2467.1
## - GLUCOSE   1   2439.1 2467.1
## - PREVMI    1   2439.4 2467.4
## - TOTCHOL   1   2440.3 2468.3
## - BMI       1   2440.4 2468.4
## <none>          2438.8 2468.8
## - CURSMOKE  1   2442.4 2470.4
## + PREVAP    1   2438.7 2470.7
## - DIABETES  1   2445.2 2473.2
## - HEARTRTE  1   2445.5 2473.5
## - BPMEDS    1   2445.7 2473.7
## - DIABP     1   2446.7 2474.7
## - PREVHYP   1   2453.3 2481.3
## - AGE       1   2533.2 2561.2
## 
## Step:  AIC=2466.91
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     TOTCHOL + AGE + DIABP + CIGPDAY + BMI + HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - SEX       1   2439.1 2465.1
## - GLUCOSE   1   2439.2 2465.2
## - CIGPDAY   1   2439.2 2465.2
## - PREVMI    1   2439.5 2465.5
## - TOTCHOL   1   2440.4 2466.4
## - BMI       1   2440.5 2466.5
## <none>          2438.9 2466.9
## - CURSMOKE  1   2442.5 2468.5
## + SYSBP     1   2438.8 2468.8
## + PREVAP    1   2438.8 2468.8
## - DIABETES  1   2445.4 2471.4
## - HEARTRTE  1   2445.6 2471.6
## - BPMEDS    1   2446.0 2472.0
## - DIABP     1   2454.4 2480.4
## - PREVHYP   1   2456.1 2482.1
## - AGE       1   2546.7 2572.7
## 
## Step:  AIC=2465.12
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + TOTCHOL + 
##     AGE + DIABP + CIGPDAY + BMI + HEARTRTE + GLUCOSE
## 
##            Df Deviance    AIC
## - GLUCOSE   1   2439.4 2463.4
## - CIGPDAY   1   2439.6 2463.6
## - PREVMI    1   2439.8 2463.8
## - BMI       1   2440.7 2464.7
## - TOTCHOL   1   2440.8 2464.8
## <none>          2439.1 2465.1
## - CURSMOKE  1   2442.7 2466.7
## + SEX       1   2438.9 2466.9
## + PREVAP    1   2439.1 2467.1
## + SYSBP     1   2439.1 2467.1
## - DIABETES  1   2445.7 2469.7
## - BPMEDS    1   2446.1 2470.1
## - HEARTRTE  1   2446.2 2470.2
## - DIABP     1   2454.8 2478.8
## - PREVHYP   1   2456.2 2480.2
## - AGE       1   2546.9 2570.9
## 
## Step:  AIC=2463.41
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + TOTCHOL + 
##     AGE + DIABP + CIGPDAY + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - CIGPDAY   1   2439.9 2461.9
## - PREVMI    1   2440.1 2462.1
## - BMI       1   2441.0 2463.0
## - TOTCHOL   1   2441.1 2463.1
## <none>          2439.4 2463.4
## - CURSMOKE  1   2443.0 2465.0
## + GLUCOSE   1   2439.1 2465.1
## + SEX       1   2439.2 2465.2
## + PREVAP    1   2439.4 2465.4
## + SYSBP     1   2439.4 2465.4
## - BPMEDS    1   2446.3 2468.3
## - HEARTRTE  1   2446.7 2468.7
## - DIABETES  1   2447.4 2469.4
## - DIABP     1   2455.2 2477.2
## - PREVHYP   1   2456.5 2478.5
## - AGE       1   2547.0 2569.0
## 
## Step:  AIC=2461.93
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + TOTCHOL + 
##     AGE + DIABP + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - PREVMI    1   2440.6 2460.6
## - BMI       1   2441.5 2461.5
## - TOTCHOL   1   2441.6 2461.6
## <none>          2439.9 2461.9
## + CIGPDAY   1   2439.4 2463.4
## + SEX       1   2439.5 2463.5
## + GLUCOSE   1   2439.6 2463.6
## + PREVAP    1   2439.9 2463.9
## + SYSBP     1   2439.9 2463.9
## - BPMEDS    1   2446.7 2466.7
## - HEARTRTE  1   2447.1 2467.1
## - DIABETES  1   2447.9 2467.9
## - CURSMOKE  1   2453.0 2473.0
## - DIABP     1   2455.8 2475.8
## - PREVHYP   1   2456.9 2476.9
## - AGE       1   2547.0 2567.0
## 
## Step:  AIC=2460.57
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + TOTCHOL + AGE + 
##     DIABP + BMI + HEARTRTE
## 
##            Df Deviance    AIC
## - BMI       1   2442.1 2460.1
## - TOTCHOL   1   2442.3 2460.3
## <none>          2440.6 2460.6
## + PREVMI    1   2439.9 2461.9
## + CIGPDAY   1   2440.1 2462.1
## + SEX       1   2440.1 2462.1
## + GLUCOSE   1   2440.3 2462.3
## + SYSBP     1   2440.6 2462.6
## + PREVAP    1   2440.6 2462.6
## - BPMEDS    1   2447.4 2465.4
## - HEARTRTE  1   2447.8 2465.8
## - DIABETES  1   2448.8 2466.8
## - CURSMOKE  1   2454.1 2472.1
## - DIABP     1   2456.3 2474.3
## - PREVHYP   1   2457.8 2475.8
## - AGE       1   2550.6 2568.6
## 
## Step:  AIC=2460.12
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + TOTCHOL + AGE + 
##     DIABP + HEARTRTE
## 
##            Df Deviance    AIC
## - TOTCHOL   1   2443.8 2459.8
## <none>          2442.1 2460.1
## + BMI       1   2440.6 2460.6
## + PREVMI    1   2441.5 2461.5
## + CIGPDAY   1   2441.6 2461.6
## + SEX       1   2441.6 2461.6
## + GLUCOSE   1   2441.9 2461.9
## + SYSBP     1   2442.1 2462.1
## + PREVAP    1   2442.1 2462.1
## - BPMEDS    1   2449.0 2465.0
## - HEARTRTE  1   2449.2 2465.2
## - DIABETES  1   2451.1 2467.1
## - CURSMOKE  1   2454.6 2470.6
## - PREVHYP   1   2460.2 2476.2
## - DIABP     1   2461.0 2477.0
## - AGE       1   2551.7 2567.7
## 
## Step:  AIC=2459.81
## STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + 
##     HEARTRTE
## 
##            Df Deviance    AIC
## <none>          2443.8 2459.8
## + TOTCHOL   1   2442.1 2460.1
## + BMI       1   2442.3 2460.3
## + SEX       1   2443.0 2461.0
## + PREVMI    1   2443.2 2461.2
## + CIGPDAY   1   2443.2 2461.2
## + GLUCOSE   1   2443.6 2461.6
## + SYSBP     1   2443.8 2461.8
## + PREVAP    1   2443.8 2461.8
## - BPMEDS    1   2450.4 2464.4
## - HEARTRTE  1   2451.6 2465.6
## - DIABETES  1   2452.7 2466.7
## - CURSMOKE  1   2456.7 2470.7
## - PREVHYP   1   2461.6 2475.6
## - DIABP     1   2462.5 2476.5
## - AGE       1   2551.7 2565.7
## 
## Call:
## glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + 
##     AGE + DIABP + HEARTRTE, family = binomial(link = "logit"), 
##     data = fr.missf_p1)
## 
## Deviance Residuals: 
##     Min       1Q   Median       3Q      Max  
## -1.3955  -0.4649  -0.3255  -0.2367   2.9230  
## 
## Coefficients:
##              Estimate Std. Error z value Pr(>|z|)    
## (Intercept) -7.459839   0.645143 -11.563  < 2e-16 ***
## CURSMOKE1    0.401439   0.112012   3.584 0.000339 ***
## DIABETES1    0.739673   0.235375   3.143 0.001675 ** 
## BPMEDS1      0.547228   0.207449   2.638 0.008342 ** 
## PREVHYP1     0.597373   0.141426   4.224 2.40e-05 ***
## AGE          0.071244   0.007065  10.085  < 2e-16 ***
## DIABP        0.021968   0.005071   4.332 1.48e-05 ***
## HEARTRTE    -0.012629   0.004590  -2.751 0.005933 ** 
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## (Dispersion parameter for binomial family taken to be 1)
## 
##     Null deviance: 2756.0  on 4433  degrees of freedom
## Residual deviance: 2443.8  on 4426  degrees of freedom
## AIC: 2459.8
## 
## Number of Fisher Scoring iterations: 6

-Backwardsで最良のモデルとして選ばれたのは glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + HEARTRTE, family = binomial(link = “logit”), data = fr.missf_p1)

stepwise_results<-
  glm(formula = STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + 
    AGE + DIABP + HEARTRTE, family = binomial(link = "logit"), 
    data = fr.missf_p1) %>% 
  summary() %>% 
  .$coefficients %>% 
  as.data.frame() %>% 
  rownames_to_column() %>% 
  rename("var"="rowname") %>% 
  mutate(OR=exp(Estimate),
         Lower=exp(Estimate-1.96*`Std. Error`),
         Upper=exp(Estimate+1.96*`Std. Error`)) %>% 
  select(var,OR,Lower,Upper,"p"="Pr(>|z|)") %>% 
  #すべての変数を丸める
  mutate_if(is.numeric,~round(.,3))

#結果を表示
stepwise_results
##           var    OR Lower Upper     p
## 1 (Intercept) 0.001 0.000 0.002 0.000
## 2   CURSMOKE1 1.494 1.199 1.861 0.000
## 3   DIABETES1 2.095 1.321 3.323 0.002
## 4     BPMEDS1 1.728 1.151 2.596 0.008
## 5    PREVHYP1 1.817 1.377 2.398 0.000
## 6         AGE 1.074 1.059 1.089 0.000
## 7       DIABP 1.022 1.012 1.032 0.000
## 8    HEARTRTE 0.987 0.979 0.996 0.006
#plot
stepwise_results %>% 
  ggplot(aes(y=var,x=OR))+
  geom_point()+
  geom_errorbar(aes(xmin=Lower,xmax=Upper),width=0.2)+
  geom_vline(xintercept=1,color="red")

- ORが発散することなくとてもいい感じの推定ができたので、このモデルを 1. 交互作用項、非線形項を含まない線形の全変数モデル(lin_model)における最終モデル(lin_final_model)とする

lin_final_formula<-as.formula(STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + HEARTRTE)

lin_final_model<-
  glm(formula = lin_final_formula, 
      family = binomial(link = "logit"), 
      #x=T,y=T,
      data = fr.missf_p1)

予測性能の評価

ROC AUC

# risk prediction fitting
fr.missf_p1$fitted.lin.fin<-
  predict(lin_final_model,
          type="response") 

# ROC AUC
roc.lin.final<-
  roc(STROKE~fitted.lin.fin,
    data=fr.missf_p1,
    ci=T)
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
roc.lin.final
## 
## Call:
## roc.formula(formula = STROKE ~ fitted.lin.fin, data = fr.missf_p1,     ci = T)
## 
## Data: fitted.lin.fin in 4019 controls (STROKE 0) < 415 cases (STROKE 1).
## Area under the curve: 0.7504
## 95% CI: 0.7265-0.7742 (DeLong)
roc.lin.final %>% 
  ggroc(legacy.axes=T)+
  geom_segment(aes(x = 0, xend = 1, y = 0, yend = 1), color="grey", linetype="dashed")

- ROCは0.7503518であり、中等度の予測性能と考えられる

#calibration plot
cal.lin.final<-
  val.prob(
  p=fr.missf_p1$fitted.lin.fin,
  y=fr.missf_p1$STROKEn,
  g=10,
  cex=0.5) 

- calibration plotからみても予測性能は高い

Bootstrapによるliner final modelの内的妥当性検証

optimismの算出

B<-100 #number of resampling 
N<-dim(fr.missf_p1)[1] #dataのdimentionを返す→4434行x39列→そのうち一番目(4434)を取得しNとする
AUC.i1<-AUC.i2<-numeric(B) 

for(i in 1:B){  

  #bootstrap random sampling 
  bs.i<-sample(1:N,N,replace=TRUE) #重複を許して1~4434までの数を4434回サンプリングする
  
  #bootstrap samplingに基づき、dataから集団を再構成 →data.iとする
  fr.missf_p1.i<-fr.missf_p1[bs.i,] 
  
  #bootstrapしたデータセットごとで回帰モデル構築→各bootstrap dataからリスク予測確率の算出→data2.1のprob_1列に格納
  lin.fin.cv.res.i<-
    glm(formula = lin_final_formula, 
      family = binomial(link = "logit"), 
      data = fr.missf_p1.i)
  
  fr.missf_p1.i$lin.fin.1<- #lin.fin.1では、bootstrap dataから構築した新しいロジスティク回帰モデルを使い、そのbootstrap dataに対するリスク予測確率を格納
    predict(lin.fin.cv.res.i,
            data=fr.missf_p1.i,
            type="response") 
 
  #AUCの算出;Bootstrap回数(B=100)分のAUCを算出して結果を格納;各bootstrap dataに対するAUC
  AUC.i1[i]<-roc(STROKE~lin.fin.1,data=fr.missf_p1.i)$auc 
  
  
  #bootstrapで作成した各回帰モデルを使って、オリジナルデータ(fr.missf_p1)に対するリスク予測確率を算出→fr.missf_p1のlin.fin.2列に格納;AUC算出
  fr.missf_p1$lin.fin.2<-
    predict(lin.fin.cv.res.i,
            newdata=fr.missf_p1, ##dataではなくnewdataにする必要がある!!!!
            type="response") 
  
  AUC.i2[i]<-roc(STROKE~lin.fin.2,data=fr.missf_p1)$auc #ここで得られるAUCはbootstrap dataを用いてoriginal dataに外挿したときのAUC
  
  #print(paste(i,"th bootstrap iteration is completed.",sep="")) 
}  

opt2<-AUC.i1-AUC.i2 
#(bootstrap samplingした各data setを使い、それぞれ導いた回帰モデルにおけるAUC)ー(bootstrap samplingした各data setを使い、original dataに外挿したときのAUC)
summary(opt2);hist(opt2)
##      Min.   1st Qu.    Median      Mean   3rd Qu.      Max. 
## -0.024696 -0.005136  0.006434  0.004972  0.014323  0.033388

optimismを用いたbias corrected AUCの算出

lam2<-mean(opt2) #estimate of the optimism 

lin.cor.AUC<-roc.lin.final$auc-lam2 #bias corrected AUC estimate

lin.cor.AUC
## [1] 0.74538
  • Linerity final modelによる予測モデル構築を行い、Bootstrapによるbias corrected AUCを算出したところ、0.74538であった
  • 当初、2個目のpredictのdata部分をnewdataにしていなかったためoptimismが非常に大きく出てしまっていた。回帰モデルの内部におけるdataとpredictにおける外挿したいdataが異なるときは、newdataに設定する必要がある

Cross validationによる内的妥当性の検証

#k-fold CV 
k <-5 
AUC_CV <-data.frame(matrix(ncol=2,nrow=k)) 

lin_final_formula<-as.formula(STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + HEARTRTE)

lin_final_model<-
  glm(formula = lin_final_formula, 
      family = binomial(link = "logit"), 
      data = fr.missf_p1)

#Randomly shuffle the data 
fr.missf_p1.r<-fr.missf_p1[sample(nrow(fr.missf_p1)),] 
 
#Create k equally size folds 
folds <- cut(seq(1,nrow(fr.missf_p1.r)),breaks=k,labels=FALSE) 
 
#Perform k fold cross validation 
for(i in 1:k){  

  #Segment data2r by fold using the which() function  
testIndexes <- which(folds==i,arr.ind=TRUE) 
testData <- fr.missf_p1.r[testIndexes, ] 
trainData <- fr.missf_p1.r[-testIndexes, ] 
fit1<-glm(formula = lin_final_formula, family = binomial(link = "logit"), data = trainData)
testData$fitted<-predict(fit1,testData,type="response") 
ROC <- roc(testData$STROKE, testData$fitted) 
AUC_CV[i,2] <- ROC$auc 
AUC_CV[i,1] <- i 

#print(paste(i,"th cross-validation iteration is completed.", sep="")) 
}  
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
names(AUC_CV)[2] <- "AUC_cv" 
names(AUC_CV)[1] <- "k" 
print(summary(AUC_CV$AUC_cv)) 
##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##  0.7312  0.7332  0.7342  0.7463  0.7659  0.7671
  • CVではAUCの平均値は0.7463201

2. 交互作用項、非線形項を含む線形の全変数モデルを考える(full_model)

用いる変数はである

  • full modelのうち、前述で多重共線性やsparseの問題から削除した変数(PREVSTRK,PREVCHD)を除いたモデルを考える
fullmodel
## [1] "STROKE~SEX+CURSMOKE+DIABETES+BPMEDS+PREVCHD+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+rcs(BMI,4)+rcs(HEARTRTE,4)+rcs(GLUCOSE,4)+SEX:PREVCHD+SEX:PREVAP+SEX:PREVMI+SEX:PREVHYP+SEX:DIABP+CURSMOKE:HEARTRTE+DIABETES:TOTCHOL+DIABETES:SYSBP+BPMEDS:PREVCHD+BPMEDS:TOTCHOL+BPMEDS:AGE+PREVCHD:GLUCOSE+PREVHYP:BMI+TOTCHOL:AGE+HEARTRTE:GLUCOSE"
glm(as.formula(fullmodel),data=fr.missf_p1,
      family = binomial(link = "logit")) 
## 
## Call:  glm(formula = as.formula(fullmodel), family = binomial(link = "logit"), 
##     data = fr.missf_p1)
## 
## Coefficients:
##                (Intercept)                        SEX2  
##                 -5.2535723                  -1.1953373  
##                  CURSMOKE1                   DIABETES1  
##                 -1.2365073                   4.0207549  
##                    BPMEDS1                    PREVCHD1  
##                  5.2898809                   1.1035782  
##                    PREVAP1                     PREVMI1  
##                 -0.3720497                   0.0550895  
##                   PREVHYP1                     TOTCHOL  
##                  1.5148234                   0.0066005  
##                        AGE                       SYSBP  
##                  0.1010951                   0.0013414  
##                      DIABP                     CIGPDAY  
##                  0.0127927                   0.0026360  
##             rcs(BMI, 4)BMI             rcs(BMI, 4)BMI'  
##                 -0.0862948                   0.2278817  
##           rcs(BMI, 4)BMI''    rcs(HEARTRTE, 4)HEARTRTE  
##                 -0.5949000                   0.0094925  
##  rcs(HEARTRTE, 4)HEARTRTE'  rcs(HEARTRTE, 4)HEARTRTE''  
##                 -0.2123066                   0.5429251  
##     rcs(GLUCOSE, 4)GLUCOSE     rcs(GLUCOSE, 4)GLUCOSE'  
##                 -0.0611513                   0.1259855  
##   rcs(GLUCOSE, 4)GLUCOSE''               SEX2:PREVCHD1  
##                 -0.3977397                  -0.4496324  
##               SEX2:PREVAP1                SEX2:PREVMI1  
##                  0.9761805                   1.3096815  
##              SEX2:PREVHYP1                  SEX2:DIABP  
##                  0.0700994                   0.0122176  
##         CURSMOKE0:HEARTRTE          CURSMOKE1:HEARTRTE  
##                 -0.0207419                          NA  
##          DIABETES1:TOTCHOL             DIABETES1:SYSBP  
##                 -0.0066810                  -0.0112544  
##           BPMEDS1:PREVCHD1             BPMEDS1:TOTCHOL  
##                 -0.8348873                  -0.0085763  
##                BPMEDS1:AGE            PREVCHD0:GLUCOSE  
##                 -0.0439211                   0.0103560  
##           PREVCHD1:GLUCOSE                PREVHYP0:BMI  
##                         NA                   0.0374607  
##               PREVHYP1:BMI                 TOTCHOL:AGE  
##                         NA                  -0.0001260  
##           HEARTRTE:GLUCOSE  
##                  0.0003235  
## 
## Degrees of Freedom: 4433 Total (i.e. Null);  4396 Residual
## Null Deviance:       2756 
## Residual Deviance: 2395  AIC: 2471
fullmodel2<-
  STROKE~SEX+CURSMOKE+DIABETES+BPMEDS+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+
  rcs(BMI,4)+rcs(HEARTRTE,4)+rcs(GLUCOSE,4)+
  SEX:PREVAP+SEX:PREVMI+SEX:PREVHYP+SEX:DIABP+CURSMOKE:HEARTRTE+DIABETES:TOTCHOL+DIABETES:SYSBP+BPMEDS:TOTCHOL+
  BPMEDS:AGE+PREVHYP:BMI+TOTCHOL:AGE+HEARTRTE:GLUCOSE

fullmodel3<-STROKE~SEX+CURSMOKE+DIABETES+BPMEDS+PREVAP+PREVMI+PREVHYP+TOTCHOL+AGE+SYSBP+DIABP+CIGPDAY+
  rcs(BMI,4)+rcs(HEARTRTE,4)+rcs(GLUCOSE,4)+SEX:PREVHYP+SEX:PREVMI

VIFの評価

#dfが大きいのでGVIFを算出するcar::vifを用いる
glm(as.formula(fullmodel3),data=fr.missf_p1,
      family = binomial(link = "logit")) %>% 
  car::vif(type="predictor")
## Warning in vif.lm(., type = "predictor"): type = 'predictor' is available only for unweighted linear models;
##   type = 'terms' will be used
##                      GVIF Df GVIF^(1/(2*Df))
## SEX              2.570312  1        1.603219
## CURSMOKE         2.463038  1        1.569407
## DIABETES         1.751968  1        1.323619
## BPMEDS           1.134620  1        1.065186
## PREVAP           1.204167  1        1.097345
## PREVMI           1.687747  1        1.299133
## PREVHYP          2.854402  1        1.689498
## TOTCHOL          1.089812  1        1.043941
## AGE              1.329260  1        1.152935
## SYSBP            3.727491  1        1.930671
## DIABP            2.981403  1        1.726674
## CIGPDAY          2.594084  1        1.610616
## rcs(BMI, 4)      1.323785  3        1.047859
## rcs(HEARTRTE, 4) 1.150514  3        1.023643
## rcs(GLUCOSE, 4)  1.866674  3        1.109630
## SEX:PREVHYP      3.811174  1        1.952223
## SEX:PREVMI       1.557143  1        1.247855
  • fullmodel2では交互作用項が多すぎるためか計算不能になるので、臨床的な(感覚的に)視点から交互作用項を減らしたmodel3を考える
  • fullmodel3ではGVIFの問題は気にならないためこのまま進める

Backwards stepwiseによる変数選択

glm(as.formula(fullmodel3),data=fr.missf_p1,
      family = binomial(link = "logit")) %>% 
  step(direction="both") %>% 
  summary()
## Start:  AIC=2472.26
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + PREVMI + 
##     PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + rcs(BMI, 
##     4) + rcs(HEARTRTE, 4) + rcs(GLUCOSE, 4) + SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - rcs(BMI, 4)       3   2426.7 2468.7
## - PREVAP            1   2424.3 2470.3
## - SYSBP             1   2424.3 2470.3
## - CIGPDAY           1   2424.5 2470.5
## - rcs(GLUCOSE, 4)   3   2428.9 2470.9
## - SEX:PREVHYP       1   2425.2 2471.2
## - TOTCHOL           1   2425.4 2471.4
## <none>                  2424.3 2472.3
## - SEX:PREVMI        1   2426.5 2472.5
## - CURSMOKE          1   2428.0 2474.0
## - DIABETES          1   2429.0 2475.0
## - BPMEDS            1   2430.7 2476.7
## - rcs(HEARTRTE, 4)  3   2436.6 2478.6
## - DIABP             1   2433.4 2479.4
## - AGE               1   2515.0 2561.0
## 
## Step:  AIC=2468.74
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + PREVMI + 
##     PREVHYP + TOTCHOL + AGE + SYSBP + DIABP + CIGPDAY + rcs(HEARTRTE, 
##     4) + rcs(GLUCOSE, 4) + SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - SYSBP             1   2426.7 2466.7
## - PREVAP            1   2426.7 2466.7
## - CIGPDAY           1   2427.0 2467.0
## - rcs(GLUCOSE, 4)   3   2431.6 2467.6
## - SEX:PREVHYP       1   2427.9 2467.9
## - TOTCHOL           1   2428.1 2468.1
## <none>                  2426.7 2468.7
## - SEX:PREVMI        1   2429.0 2469.0
## - CURSMOKE          1   2430.2 2470.2
## - DIABETES          1   2432.0 2472.0
## + rcs(BMI, 4)       3   2424.3 2472.3
## - BPMEDS            1   2433.3 2473.3
## - rcs(HEARTRTE, 4)  3   2438.9 2474.9
## - DIABP             1   2437.6 2477.6
## - AGE               1   2517.8 2557.8
## 
## Step:  AIC=2466.74
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVAP + PREVMI + 
##     PREVHYP + TOTCHOL + AGE + DIABP + CIGPDAY + rcs(HEARTRTE, 
##     4) + rcs(GLUCOSE, 4) + SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - PREVAP            1   2426.7 2464.7
## - CIGPDAY           1   2427.0 2465.0
## - rcs(GLUCOSE, 4)   3   2431.6 2465.6
## - SEX:PREVHYP       1   2427.9 2465.9
## - TOTCHOL           1   2428.1 2466.1
## <none>                  2426.7 2466.7
## - SEX:PREVMI        1   2429.0 2467.0
## - CURSMOKE          1   2430.2 2468.2
## + SYSBP             1   2426.7 2468.7
## - DIABETES          1   2432.0 2470.0
## + rcs(BMI, 4)       3   2424.3 2470.3
## - BPMEDS            1   2433.3 2471.3
## - rcs(HEARTRTE, 4)  3   2438.9 2472.9
## - DIABP             1   2445.8 2483.8
## - AGE               1   2527.5 2565.5
## 
## Step:  AIC=2464.74
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     TOTCHOL + AGE + DIABP + CIGPDAY + rcs(HEARTRTE, 4) + rcs(GLUCOSE, 
##     4) + SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - CIGPDAY           1   2427.0 2463.0
## - rcs(GLUCOSE, 4)   3   2431.6 2463.6
## - SEX:PREVHYP       1   2427.9 2463.9
## - TOTCHOL           1   2428.1 2464.1
## <none>                  2426.7 2464.7
## - SEX:PREVMI        1   2429.0 2465.0
## - CURSMOKE          1   2430.2 2466.2
## + PREVAP            1   2426.7 2466.7
## + SYSBP             1   2426.7 2466.7
## - DIABETES          1   2432.0 2468.0
## + rcs(BMI, 4)       3   2424.3 2468.3
## - BPMEDS            1   2433.4 2469.4
## - rcs(HEARTRTE, 4)  3   2438.9 2470.9
## - DIABP             1   2445.8 2481.8
## - AGE               1   2529.1 2565.1
## 
## Step:  AIC=2462.99
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     TOTCHOL + AGE + DIABP + rcs(HEARTRTE, 4) + rcs(GLUCOSE, 4) + 
##     SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - rcs(GLUCOSE, 4)   3   2431.9 2461.9
## - SEX:PREVHYP       1   2428.2 2462.2
## - TOTCHOL           1   2428.3 2462.3
## <none>                  2427.0 2463.0
## - SEX:PREVMI        1   2429.3 2463.3
## + CIGPDAY           1   2426.7 2464.7
## + PREVAP            1   2427.0 2465.0
## + SYSBP             1   2427.0 2465.0
## - DIABETES          1   2432.2 2466.2
## + rcs(BMI, 4)       3   2424.5 2466.5
## - BPMEDS            1   2433.6 2467.6
## - rcs(HEARTRTE, 4)  3   2439.0 2469.0
## - CURSMOKE          1   2437.6 2471.6
## - DIABP             1   2446.1 2480.1
## - AGE               1   2529.2 2563.2
## 
## Step:  AIC=2461.88
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     TOTCHOL + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVHYP + 
##     SEX:PREVMI
## 
##                    Df Deviance    AIC
## - TOTCHOL           1   2433.4 2461.4
## - SEX:PREVHYP       1   2433.4 2461.4
## <none>                  2431.9 2461.9
## - SEX:PREVMI        1   2433.9 2461.9
## + rcs(GLUCOSE, 4)   3   2427.0 2463.0
## + CIGPDAY           1   2431.6 2463.6
## + PREVAP            1   2431.9 2463.9
## + SYSBP             1   2431.9 2463.9
## + rcs(BMI, 4)       3   2429.1 2465.1
## - BPMEDS            1   2438.7 2466.7
## - DIABETES          1   2438.9 2466.9
## - rcs(HEARTRTE, 4)  3   2443.6 2467.6
## - CURSMOKE          1   2442.6 2470.6
## - DIABP             1   2450.7 2478.7
## - AGE               1   2536.6 2564.6
## 
## Step:  AIC=2461.38
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVHYP + SEX:PREVMI
## 
##                    Df Deviance    AIC
## - SEX:PREVHYP       1   2434.8 2460.8
## <none>                  2433.4 2461.4
## - SEX:PREVMI        1   2435.4 2461.4
## + TOTCHOL           1   2431.9 2461.9
## + rcs(GLUCOSE, 4)   3   2428.3 2462.3
## + CIGPDAY           1   2433.2 2463.2
## + PREVAP            1   2433.4 2463.4
## + SYSBP             1   2433.4 2463.4
## + rcs(BMI, 4)       3   2430.3 2464.3
## - BPMEDS            1   2439.9 2465.9
## - DIABETES          1   2440.3 2466.3
## - rcs(HEARTRTE, 4)  3   2445.5 2467.5
## - CURSMOKE          1   2444.2 2470.2
## - DIABP             1   2451.9 2477.9
## - AGE               1   2536.6 2562.6
## 
## Step:  AIC=2460.77
## STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + 
##     AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI
## 
##                    Df Deviance    AIC
## <none>                  2434.8 2460.8
## - SEX:PREVMI        1   2437.0 2461.0
## + SEX:PREVHYP       1   2433.4 2461.4
## + TOTCHOL           1   2433.4 2461.4
## + rcs(GLUCOSE, 4)   3   2429.4 2461.4
## + CIGPDAY           1   2434.5 2462.5
## + SYSBP             1   2434.8 2462.8
## + PREVAP            1   2434.8 2462.8
## + rcs(BMI, 4)       3   2431.4 2463.4
## - BPMEDS            1   2441.8 2465.8
## - DIABETES          1   2441.9 2465.9
## - rcs(HEARTRTE, 4)  3   2446.9 2466.9
## - CURSMOKE          1   2445.4 2469.4
## - PREVHYP           1   2451.8 2475.8
## - DIABP             1   2453.6 2477.6
## - AGE               1   2542.1 2566.1
## 
## Call:
## glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
##     PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = "logit"), 
##     data = fr.missf_p1)
## 
## Deviance Residuals: 
##     Min       1Q   Median       3Q      Max  
## -1.3035  -0.4660  -0.3275  -0.2321   2.9086  
## 
## Coefficients:
##                             Estimate Std. Error z value Pr(>|z|)    
## (Intercept)                -9.297986   1.317164  -7.059 1.68e-12 ***
## SEX2                       -0.118785   0.115042  -1.033  0.30182    
## CURSMOKE1                   0.376133   0.115624   3.253  0.00114 ** 
## DIABETES1                   0.672881   0.240467   2.798  0.00514 ** 
## BPMEDS1                     0.569736   0.209547   2.719  0.00655 ** 
## PREVMI1                    -0.052790   0.369570  -0.143  0.88641    
## PREVHYP1                    0.586447   0.141663   4.140 3.48e-05 ***
## AGE                         0.071503   0.007106  10.062  < 2e-16 ***
## DIABP                       0.022128   0.005091   4.347 1.38e-05 ***
## rcs(HEARTRTE, 4)HEARTRTE    0.018041   0.018255   0.988  0.32303    
## rcs(HEARTRTE, 4)HEARTRTE'  -0.184369   0.084305  -2.187  0.02875 *  
## rcs(HEARTRTE, 4)HEARTRTE''  0.488790   0.213925   2.285  0.02232 *  
## SEX2:PREVMI1                1.017895   0.670499   1.518  0.12899    
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## (Dispersion parameter for binomial family taken to be 1)
## 
##     Null deviance: 2756.0  on 4433  degrees of freedom
## Residual deviance: 2434.8  on 4421  degrees of freedom
## AIC: 2460.8
## 
## Number of Fisher Scoring iterations: 6
  • glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = “logit”), data = fr.missf_p1) がモデルとして選ばれた
stepwise_results<-
  glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
    PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = "logit"), 
    data = fr.missf_p1) %>% 
  summary() %>% 
  .$coefficients %>% 
  as.data.frame() %>% 
  rownames_to_column() %>% 
  rename("var"="rowname") %>% 
  mutate(OR=exp(Estimate),
         Lower=exp(Estimate-1.96*`Std. Error`),
         Upper=exp(Estimate+1.96*`Std. Error`)) %>% 
  select(var,OR,Lower,Upper,"p"="Pr(>|z|)") %>% 
  #すべての変数を丸める
  mutate_if(is.numeric,~round(.,3))

#結果を表示
stepwise_results
##                           var    OR Lower  Upper     p
## 1                 (Intercept) 0.000 0.000  0.001 0.000
## 2                        SEX2 0.888 0.709  1.113 0.302
## 3                   CURSMOKE1 1.457 1.161  1.827 0.001
## 4                   DIABETES1 1.960 1.223  3.140 0.005
## 5                     BPMEDS1 1.768 1.172  2.666 0.007
## 6                     PREVMI1 0.949 0.460  1.957 0.886
## 7                    PREVHYP1 1.798 1.362  2.373 0.000
## 8                         AGE 1.074 1.059  1.089 0.000
## 9                       DIABP 1.022 1.012  1.033 0.000
## 10   rcs(HEARTRTE, 4)HEARTRTE 1.018 0.982  1.055 0.323
## 11  rcs(HEARTRTE, 4)HEARTRTE' 0.832 0.705  0.981 0.029
## 12 rcs(HEARTRTE, 4)HEARTRTE'' 1.630 1.072  2.480 0.022
## 13               SEX2:PREVMI1 2.767 0.744 10.299 0.129
#plot
stepwise_results %>% 
  ggplot(aes(y=var,x=OR))+
  geom_point()+
  geom_errorbar(aes(xmin=Lower,xmax=Upper),width=0.2)+
  geom_vline(xintercept=1,color="red")

- 交互作用項のORが増大しており発散気味だが、このまま計算を進める

#複雑なロジスティク回帰モデル
step_final_model<-
  glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
    PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = "logit"), 
    data = fr.missf_p1)

予測性能の評価

ROC AUC

# risk prediction fitting
fr.missf_p1$fitted.step.fin<-
  predict(step_final_model,
          type="response") 

# ROC AUC
roc.step.final<-
  roc(STROKE~fitted.step.fin,
    data=fr.missf_p1,
    ci=T)
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
roc.step.final
## 
## Call:
## roc.formula(formula = STROKE ~ fitted.step.fin, data = fr.missf_p1,     ci = T)
## 
## Data: fitted.step.fin in 4019 controls (STROKE 0) < 415 cases (STROKE 1).
## Area under the curve: 0.7533
## 95% CI: 0.7292-0.7774 (DeLong)
roc.step.final %>% 
  ggroc(legacy.axes=T)+
  geom_segment(aes(x = 0, xend = 1, y = 0, yend = 1), color="grey", linetype="dashed")

  • 複雑なロジスティク回帰モデル(step_final_model)のROC_AUCは0.7532998と中等度の予測性能である

Calibration plot

#calibration plot
cal.step.final<-
  val.prob(
  p=fr.missf_p1$fitted.step.fin,
  y=fr.missf_p1$STROKEn,
  g=10,
  cex=0.5) 

  • calibration能は良好だが、liner modelやlassoのほうが当てはまりは視覚的に良さそうに見える

Bootstrapによるliner final modelの内的妥当性検証

optimismの算出

B<-100 #number of resampling 
N<-dim(fr.missf_p1)[1] #dataのdimentionを返す→4434行x39列→そのうち一番目(4434)を取得しNとする
AUC.i1<-AUC.i2<-numeric(B) 

for(i in 1:B){  

  #bootstrap random sampling 
  bs.i<-sample(1:N,N,replace=TRUE) #重複を許して1~4434までの数を4434回サンプリングする
  
  #bootstrap samplingに基づき、dataから集団を再構成 →data.iとする
  fr.missf_p1.i<-fr.missf_p1[bs.i,] 
  
  #bootstrapしたデータセットごとで回帰モデル構築→各bootstrap dataからリスク予測確率の算出→data2.1のprob_1列に格納
  step.fin.cv.res.i<-
    glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
    PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = "logit"), 
    data = fr.missf_p1.i)
  
  fr.missf_p1.i$step.fin.1<- #step.fin.1では、bootstrap dataから構築した新しいロジスティク回帰モデルを使い、そのbootstrap dataに対するリスク予測確率を格納
    predict(step.fin.cv.res.i,
            data=fr.missf_p1.i,
            type="response") 
 
  #AUCの算出;Bootstrap回数(B=100)分のAUCを算出して結果を格納;各bootstrap dataに対するAUC
  AUC.i1[i]<-roc(STROKE~step.fin.1,data=fr.missf_p1.i)$auc 
  
  
  #bootstrapで作成した各回帰モデルを使って、オリジナルデータ(fr.missf_p1)に対するリスク予測確率を算出→fr.missf_p1のlin.fin.2列に格納;AUC算出
  fr.missf_p1$step.fin.2<-
    predict(step.fin.cv.res.i,
            newdata=fr.missf_p1,
            type="response") 
  
  AUC.i2[i]<-roc(STROKE~step.fin.2,data=fr.missf_p1)$auc #ここで得られるAUCはbootstrap dataを用いてoriginal dataに外挿したときのAUC
  
  #print(paste(i,"th bootstrap iteration is completed.",sep="")) 
}  

opt3<-AUC.i1-AUC.i2 
#(bootstrap samplingした各data setを使い、それぞれ導いた回帰モデルにおけるAUC)ー(bootstrap samplingした各data setを使い、original dataに外挿したときのAUC)
summary(opt3);hist(opt3)
##      Min.   1st Qu.    Median      Mean   3rd Qu.      Max. 
## -0.026013 -0.001946  0.006097  0.005969  0.015236  0.036204

lam3<-mean(opt3) #estimate of the optimism 

step.cor.AUC<-roc.step.final$auc-lam3 #bias corrected AUC estimate

step.cor.AUC
## [1] 0.7473308
  • liner modelと同じく、複雑なロジスティク回帰モデルでもoptimismが大きく、非常にoverfittingが生じていることが示唆される

Cross validationによる内的妥当性の検証

#k-fold CV 
k <-5 
AUC_CV <-data.frame(matrix(ncol=2,nrow=k)) 

#Randomly shuffle the data 
fr.missf_p1.r<-fr.missf_p1[sample(nrow(fr.missf_p1)),] 
 
#Create k equally size folds 
folds <- cut(seq(1,nrow(fr.missf_p1.r)),breaks=k,labels=FALSE) 
 
#Perform k fold cross validation 
for(i in 1:k){  

  #Segment data2r by fold using the which() function  
testIndexes <- which(folds==i,arr.ind=TRUE) 
testData <- fr.missf_p1.r[testIndexes, ] 
trainData <- fr.missf_p1.r[-testIndexes, ] 
fit1<-
  glm(formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
    PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI, family = binomial(link = "logit"), 
    data = trainData)
testData$fitted<-predict(fit1,testData,type="response") 
ROC <- roc(testData$STROKE, testData$fitted) 
AUC_CV[i,2] <- ROC$auc 
AUC_CV[i,1] <- i 

#print(paste(i,"th cross-validation iteration is completed.", sep="")) 
}  
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
## Setting levels: control = 0, case = 1
## Setting direction: controls < cases
names(AUC_CV)[2] <- "AUC_cv" 
names(AUC_CV)[1] <- "k" 
print(summary(AUC_CV$AUC_cv)) 
##    Min. 1st Qu.  Median    Mean 3rd Qu.    Max. 
##  0.7133  0.7226  0.7453  0.7458  0.7583  0.7894
  • CVではAUCはオリジナルデータにおけるAUC: 0.7532998よりも多少小さく(0.7457838)なった

Bootstrapを別の関数を用いて再度検証

使うモデルはSimple model(lin_final_formula)

STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + HEARTRTE

lin_final_formula<-as.formula(STROKE ~ CURSMOKE + DIABETES + BPMEDS + PREVHYP + AGE + DIABP + HEARTRTE)

lin_final_model.lrm<-
  lrm(lin_final_formula,
    x=T,
    y=T,
    data=fr.missf_p1)

boot<-validate(lin_final_model.lrm,
         bw=FALSE,
         B=100,
         method="boot")

boot
##           index.orig training    test optimism index.corrected   n
## Dxy           0.5007   0.5085  0.4966   0.0119          0.4888 100
## R2            0.1469   0.1532  0.1438   0.0094          0.1375 100
## Intercept     0.0000   0.0000 -0.0611   0.0611         -0.0611 100
## Slope         1.0000   1.0000  0.9687   0.0313          0.9687 100
## Emax          0.0000   0.0000  0.0187   0.0187          0.0187 100
## D             0.0702   0.0734  0.0687   0.0047          0.0654 100
## U            -0.0005  -0.0005  0.0001  -0.0005          0.0001 100
## Q             0.0706   0.0738  0.0686   0.0053          0.0653 100
## B             0.0780   0.0777  0.0783  -0.0006          0.0786 100
## g             1.0429   1.0670  1.0295   0.0375          1.0055 100
## gp            0.0837   0.0852  0.0828   0.0025          0.0812 100
corrected.AUC<-boot[1,5]*0.5 + 0.5 #corrected AUC=Somer's D/2 + 0.5
  • rmsによるBootstrapでは、corrected AUC=0.7443924であった。
  • こちらのコードのほうが非常にシンプルで、様々な結果が出てくる
  • bias corrected AUCはSomer’s D/2 + 0.5で算出する必要があるのが厄介ではあるが。

Complex modelでも同様に実施

formula = STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI

step_final_model.lrm<-
  lrm(STROKE ~ SEX + CURSMOKE + DIABETES + BPMEDS + PREVMI + 
    PREVHYP + AGE + DIABP + rcs(HEARTRTE, 4) + SEX:PREVMI,
    x=T,
    y=T,
    data=fr.missf_p1
    )

boot2<-validate(step_final_model.lrm,
         bw=FALSE,
         B=100,
         method="boot")
## 
## Divergence or singularity in 4 samples
boot2
##           index.orig training    test optimism index.corrected  n
## Dxy           0.5066   0.5141  0.5000   0.0141          0.4925 96
## R2            0.1510   0.1577  0.1454   0.0123          0.1387 96
## Intercept     0.0000   0.0000 -0.0874   0.0874         -0.0874 96
## Slope         1.0000   1.0000  0.9540   0.0460          0.9540 96
## Emax          0.0000   0.0000  0.0272   0.0272          0.0272 96
## D             0.0722   0.0756  0.0695   0.0061          0.0661 96
## U            -0.0005  -0.0005  0.0002  -0.0006          0.0002 96
## Q             0.0727   0.0761  0.0693   0.0068          0.0659 96
## B             0.0778   0.0773  0.0782  -0.0010          0.0788 96
## g             1.0623   1.0869  1.0344   0.0525          1.0098 96
## gp            0.0846   0.0861  0.0829   0.0032          0.0814 96
corrected.AUC2<-boot2[1,5]*0.5 + 0.5 #AUC=Somer's D/2 + 0.5


corrected.AUC2
## [1] 0.7462438