Each year, millions of individuals grapple with the onset of heart disease, making it a pervasive health concern both in the United States and globally. It stands as the leading cause of death among both men and women. Extensive statistical analyses have illuminated numerous risk factors linked to the development of heart disease. These factors encompass elements such as advancing age, blood pressure levels, total cholesterol levels, diabetes, hypertension, a family history predisposed to heart disease, obesity, and a sedentary lifestyle, among others. In this notebook, we will delve into statistical tests and regression models using the Hungary and Switzerland heart disease dataset to investigate the correlation between one specific factor—maximum heart rate attainable during exercise—and its potential association with an increased likelihood of heart disease

options(repos = “https://cran.rstudio.com/”)

# Set the CRAN mirror
options(repos = "https://cran.rstudio.com/")
# Install necessary packages
install.packages("tidyverse")
## Installing package into 'C:/Users/meebo/AppData/Local/R/win-library/4.3'
## (as 'lib' is unspecified)
## package 'tidyverse' successfully unpacked and MD5 sums checked
## 
## The downloaded binary packages are in
##  C:\Users\meebo\AppData\Local\Temp\Rtmpmcleop\downloaded_packages
install.packages("janitor")
## Installing package into 'C:/Users/meebo/AppData/Local/R/win-library/4.3'
## (as 'lib' is unspecified)
## package 'janitor' successfully unpacked and MD5 sums checked
## 
## The downloaded binary packages are in
##  C:\Users\meebo\AppData\Local\Temp\Rtmpmcleop\downloaded_packages
install.packages("here")
## Installing package into 'C:/Users/meebo/AppData/Local/R/win-library/4.3'
## (as 'lib' is unspecified)
## package 'here' successfully unpacked and MD5 sums checked
## 
## The downloaded binary packages are in
##  C:\Users\meebo\AppData\Local\Temp\Rtmpmcleop\downloaded_packages
install.packages("skimr")
## Installing package into 'C:/Users/meebo/AppData/Local/R/win-library/4.3'
## (as 'lib' is unspecified)
## package 'skimr' successfully unpacked and MD5 sums checked
## 
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##  C:\Users\meebo\AppData\Local\Temp\Rtmpmcleop\downloaded_packages
library(tidyr)
library(dplyr)
## 
## Attaching package: 'dplyr'
## The following objects are masked from 'package:stats':
## 
##     filter, lag
## The following objects are masked from 'package:base':
## 
##     intersect, setdiff, setequal, union
library(readr)
library(ggplot2)
library(janitor)
## 
## Attaching package: 'janitor'
## The following objects are masked from 'package:stats':
## 
##     chisq.test, fisher.test
library(here)
## here() starts at D:/STUDY/STUDY/R
library(skimr)
library(dplyr)
library(sf)
## Linking to GEOS 3.11.1, GDAL 3.6.2, PROJ 9.1.1; sf_use_s2() is TRUE
# Set the working directory to the folder where the CSV file is located
setwd("D:/STUDY/STUDY/R")

# Read the CSV file and store it in a data frame
Heart <- read.csv("Heart Disease Dataset Hungary - Switzerland.csv")
skim_without_charts(Heart)
Data summary
Name Heart
Number of rows 1025
Number of columns 14
_______________________
Column type frequency:
numeric 14
________________________
Group variables None

Variable type: numeric

skim_variable n_missing complete_rate mean sd p0 p25 p50 p75 p100
age 0 1 54.43 9.07 29 48 56.0 61.0 77.0
sex 0 1 0.70 0.46 0 0 1.0 1.0 1.0
cp 0 1 0.94 1.03 0 0 1.0 2.0 3.0
trestbps 0 1 131.61 17.52 94 120 130.0 140.0 200.0
chol 0 1 246.00 51.59 126 211 240.0 275.0 564.0
fbs 0 1 0.15 0.36 0 0 0.0 0.0 1.0
restecg 0 1 0.53 0.53 0 0 1.0 1.0 2.0
thalach 0 1 149.11 23.01 71 132 152.0 166.0 202.0
exang 0 1 0.34 0.47 0 0 0.0 1.0 1.0
oldpeak 0 1 1.07 1.18 0 0 0.8 1.8 6.2
slope 0 1 1.39 0.62 0 1 1.0 2.0 2.0
ca 0 1 0.75 1.03 0 0 0.0 1.0 4.0
thal 0 1 2.32 0.62 0 2 2.0 3.0 3.0
target 0 1 0.51 0.50 0 0 1.0 1.0 1.0
Heart
##      age sex cp trestbps chol fbs restecg thalach exang oldpeak slope ca thal
## 1     52   1  0      125  212   0       1     168     0     1.0     2  2    3
## 2     53   1  0      140  203   1       0     155     1     3.1     0  0    3
## 3     70   1  0      145  174   0       1     125     1     2.6     0  0    3
## 4     61   1  0      148  203   0       1     161     0     0.0     2  1    3
## 5     62   0  0      138  294   1       1     106     0     1.9     1  3    2
## 6     58   0  0      100  248   0       0     122     0     1.0     1  0    2
## 7     58   1  0      114  318   0       2     140     0     4.4     0  3    1
## 8     55   1  0      160  289   0       0     145     1     0.8     1  1    3
## 9     46   1  0      120  249   0       0     144     0     0.8     2  0    3
## 10    54   1  0      122  286   0       0     116     1     3.2     1  2    2
## 11    71   0  0      112  149   0       1     125     0     1.6     1  0    2
## 12    43   0  0      132  341   1       0     136     1     3.0     1  0    3
## 13    34   0  1      118  210   0       1     192     0     0.7     2  0    2
## 14    51   1  0      140  298   0       1     122     1     4.2     1  3    3
## 15    52   1  0      128  204   1       1     156     1     1.0     1  0    0
## 16    34   0  1      118  210   0       1     192     0     0.7     2  0    2
## 17    51   0  2      140  308   0       0     142     0     1.5     2  1    2
## 18    54   1  0      124  266   0       0     109     1     2.2     1  1    3
## 19    50   0  1      120  244   0       1     162     0     1.1     2  0    2
## 20    58   1  2      140  211   1       0     165     0     0.0     2  0    2
## 21    60   1  2      140  185   0       0     155     0     3.0     1  0    2
## 22    67   0  0      106  223   0       1     142     0     0.3     2  2    2
## 23    45   1  0      104  208   0       0     148     1     3.0     1  0    2
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## 65    29   1  1      130  204   0       0     202     0     0.0     2  0    2
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## 80    52   1  1      134  201   0       1     158     0     0.8     2  1    2
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## 83    46   1  2      150  231   0       1     147     0     3.6     1  0    2
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## 334   54   0  2      110  214   0       1     158     0     1.6     1  0    2
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## 336   58   1  0      150  270   0       0     111     1     0.8     2  0    3
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## 339   56   1  2      130  256   1       0     142     1     0.6     1  1    1
## 340   60   1  0      130  253   0       1     144     1     1.4     2  1    3
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## 351   66   1  0      120  302   0       0     151     0     0.4     1  0    2
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## 359   59   1  3      134  204   0       1     162     0     0.8     2  2    2
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## 361   48   1  0      122  222   0       0     186     0     0.0     2  0    2
## 362   62   1  2      130  231   0       1     146     0     1.8     1  3    3
## 363   43   0  2      122  213   0       1     165     0     0.2     1  0    2
## 364   53   1  2      130  246   1       0     173     0     0.0     2  3    2
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## 366   53   1  2      130  246   1       0     173     0     0.0     2  3    2
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## 373   54   0  2      110  214   0       1     158     0     1.6     1  0    2
## 374   58   1  1      120  284   0       0     160     0     1.8     1  0    2
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## 376   66   1  0      160  228   0       0     138     0     2.3     2  0    1
## 377   59   1  1      140  221   0       1     164     1     0.0     2  0    2
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## 381   58   1  0      146  218   0       1     105     0     2.0     1  1    3
## 382   58   1  2      132  224   0       0     173     0     3.2     2  2    3
## 383   59   1  0      110  239   0       0     142     1     1.2     1  1    3
## 384   58   1  0      150  270   0       0     111     1     0.8     2  0    3
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## 386   51   1  2      110  175   0       1     123     0     0.6     2  0    2
## 387   42   0  2      120  209   0       1     173     0     0.0     1  0    2
## 388   77   1  0      125  304   0       0     162     1     0.0     2  3    2
## 389   64   1  0      120  246   0       0      96     1     2.2     0  1    2
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## 391   58   0  1      136  319   1       0     152     0     0.0     2  2    2
## 392   45   1  3      110  264   0       1     132     0     1.2     1  0    3
## 393   51   1  2      110  175   0       1     123     0     0.6     2  0    2
## 394   62   0  0      160  164   0       0     145     0     6.2     0  3    3
## 395   63   1  0      130  330   1       0     132     1     1.8     2  3    3
## 396   66   0  2      146  278   0       0     152     0     0.0     1  1    2
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## 398   40   1  0      110  167   0       0     114     1     2.0     1  0    3
## 399   66   1  0      160  228   0       0     138     0     2.3     2  0    1
## 400   63   1  3      145  233   1       0     150     0     2.3     0  0    1
## 401   49   1  2      120  188   0       1     139     0     2.0     1  3    3
## 402   71   0  0      112  149   0       1     125     0     1.6     1  0    2
## 403   70   1  1      156  245   0       0     143     0     0.0     2  0    2
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## 405   61   1  0      140  207   0       0     138     1     1.9     2  1    3
## 406   56   1  2      130  256   1       0     142     1     0.6     1  1    1
## 407   58   1  2      140  211   1       0     165     0     0.0     2  0    2
## 408   58   1  0      100  234   0       1     156     0     0.1     2  1    3
## 409   46   0  0      138  243   0       0     152     1     0.0     1  0    2
## 410   46   1  2      150  231   0       1     147     0     3.6     1  0    2
## 411   41   0  1      105  198   0       1     168     0     0.0     2  1    2
## 412   56   1  0      125  249   1       0     144     1     1.2     1  1    2
## 413   57   1  0      150  276   0       0     112     1     0.6     1  1    1
## 414   70   1  0      130  322   0       0     109     0     2.4     1  3    2
## 415   59   1  3      170  288   0       0     159     0     0.2     1  0    3
## 416   41   0  1      130  204   0       0     172     0     1.4     2  0    2
## 417   54   1  2      125  273   0       0     152     0     0.5     0  1    2
## 418   52   1  2      138  223   0       1     169     0     0.0     2  4    2
## 419   62   0  0      124  209   0       1     163     0     0.0     2  0    2
## 420   65   0  2      160  360   0       0     151     0     0.8     2  0    2
## 421   57   0  0      128  303   0       0     159     0     0.0     2  1    2
## 422   42   0  0      102  265   0       0     122     0     0.6     1  0    2
## 423   57   0  0      120  354   0       1     163     1     0.6     2  0    2
## 424   58   0  1      136  319   1       0     152     0     0.0     2  2    2
## 425   45   1  0      142  309   0       0     147     1     0.0     1  3    3
## 426   51   0  0      130  305   0       1     142     1     1.2     1  0    3
## 427   54   0  2      160  201   0       1     163     0     0.0     2  1    2
## 428   57   1  2      150  168   0       1     174     0     1.6     2  0    2
## 429   43   1  0      132  247   1       0     143     1     0.1     1  4    3
## 430   47   1  2      108  243   0       1     152     0     0.0     2  0    2
## 431   67   1  2      152  212   0       0     150     0     0.8     1  0    3
## 432   65   0  0      150  225   0       0     114     0     1.0     1  3    3
## 433   60   0  2      102  318   0       1     160     0     0.0     2  1    2
## 434   37   1  2      130  250   0       1     187     0     3.5     0  0    2
## 435   41   0  2      112  268   0       0     172     1     0.0     2  0    2
## 436   57   0  0      120  354   0       1     163     1     0.6     2  0    2
## 437   59   0  0      174  249   0       1     143     1     0.0     1  0    2
## 438   67   1  0      120  229   0       0     129     1     2.6     1  2    3
## 439   47   1  2      130  253   0       1     179     0     0.0     2  0    2
## 440   58   1  1      120  284   0       0     160     0     1.8     1  0    2
## 441   62   0  0      150  244   0       1     154     1     1.4     1  0    2
## 442   60   1  0      140  293   0       0     170     0     1.2     1  2    3
## 443   57   1  0      152  274   0       1      88     1     1.2     1  1    3
## 444   57   1  2      150  168   0       1     174     0     1.6     2  0    2
## 445   47   1  2      130  253   0       1     179     0     0.0     2  0    2
## 446   52   1  1      128  205   1       1     184     0     0.0     2  0    2
## 447   53   1  2      130  246   1       0     173     0     0.0     2  3    2
## 448   55   1  0      160  289   0       0     145     1     0.8     1  1    3
## 449   51   0  2      120  295   0       0     157     0     0.6     2  0    2
## 450   52   1  0      112  230   0       1     160     0     0.0     2  1    2
## 451   63   0  0      150  407   0       0     154     0     4.0     1  3    3
## 452   49   0  1      134  271   0       1     162     0     0.0     1  0    2
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## 454   49   0  1      134  271   0       1     162     0     0.0     1  0    2
## 455   65   0  0      150  225   0       0     114     0     1.0     1  3    3
## 456   69   1  3      160  234   1       0     131     0     0.1     1  1    2
## 457   47   1  2      108  243   0       1     152     0     0.0     2  0    2
## 458   39   0  2      138  220   0       1     152     0     0.0     1  0    2
## 459   43   1  0      150  247   0       1     171     0     1.5     2  0    2
## 460   51   1  0      140  261   0       0     186     1     0.0     2  0    2
## 461   69   1  2      140  254   0       0     146     0     2.0     1  3    3
## 462   48   1  2      124  255   1       1     175     0     0.0     2  2    2
## 463   52   1  3      118  186   0       0     190     0     0.0     1  0    1
## 464   43   1  0      110  211   0       1     161     0     0.0     2  0    3
## 465   67   0  2      115  564   0       0     160     0     1.6     1  0    3
## 466   38   1  2      138  175   0       1     173     0     0.0     2  4    2
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## 482   63   0  0      150  407   0       0     154     0     4.0     1  3    3
## 483   51   1  0      140  298   0       1     122     1     4.2     1  3    3
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## 492   57   1  2      150  168   0       1     174     0     1.6     2  0    2
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## 515   44   1  1      120  220   0       1     170     0     0.0     2  0    2
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## 519   49   1  2      120  188   0       1     139     0     2.0     1  3    3
## 520   61   1  0      148  203   0       1     161     0     0.0     2  1    3
## 521   59   1  0      140  177   0       1     162     1     0.0     2  1    3
## 522   58   1  1      125  220   0       1     144     0     0.4     1  4    3
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## 524   61   1  0      148  203   0       1     161     0     0.0     2  1    3
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## 526   51   0  2      130  256   0       0     149     0     0.5     2  0    2
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## 528   62   0  0      124  209   0       1     163     0     0.0     2  0    2
## 529   59   1  3      178  270   0       0     145     0     4.2     0  0    3
## 530   69   1  3      160  234   1       0     131     0     0.1     1  1    2
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## 536   76   0  2      140  197   0       2     116     0     1.1     1  0    2
## 537   50   0  2      120  219   0       1     158     0     1.6     1  0    2
## 538   52   1  1      120  325   0       1     172     0     0.2     2  0    2
## 539   46   1  0      120  249   0       0     144     0     0.8     2  0    3
## 540   64   1  3      170  227   0       0     155     0     0.6     1  0    3
## 541   58   1  0      128  259   0       0     130     1     3.0     1  2    3
## 542   44   1  2      140  235   0       0     180     0     0.0     2  0    2
## 543   62   0  0      140  394   0       0     157     0     1.2     1  0    2
## 544   59   1  3      134  204   0       1     162     0     0.8     2  2    2
## 545   54   1  2      125  273   0       0     152     0     0.5     0  1    2
## 546   48   1  1      110  229   0       1     168     0     1.0     0  0    3
## 547   70   1  0      130  322   0       0     109     0     2.4     1  3    2
## 548   67   0  0      106  223   0       1     142     0     0.3     2  2    2
## 549   51   0  2      120  295   0       0     157     0     0.6     2  0    2
## 550   68   1  2      118  277   0       1     151     0     1.0     2  1    3
## 551   69   1  2      140  254   0       0     146     0     2.0     1  3    3
## 552   54   1  0      122  286   0       0     116     1     3.2     1  2    2
## 553   43   0  0      132  341   1       0     136     1     3.0     1  0    3
## 554   53   1  2      130  197   1       0     152     0     1.2     0  0    2
## 555   58   1  0      100  234   0       1     156     0     0.1     2  1    3
## 556   67   1  0      125  254   1       1     163     0     0.2     1  2    3
## 557   59   1  0      140  177   0       1     162     1     0.0     2  1    3
## 558   48   1  0      122  222   0       0     186     0     0.0     2  0    2
## 559   39   0  2       94  199   0       1     179     0     0.0     2  0    2
## 560   67   1  0      120  237   0       1      71     0     1.0     1  0    2
## 561   58   0  0      130  197   0       1     131     0     0.6     1  0    2
## 562   65   0  2      155  269   0       1     148     0     0.8     2  0    2
## 563   42   0  2      120  209   0       1     173     0     0.0     1  0    2
## 564   44   1  0      112  290   0       0     153     0     0.0     2  1    2
## 565   56   1  0      132  184   0       0     105     1     2.1     1  1    1
## 566   53   0  0      138  234   0       0     160     0     0.0     2  0    2
## 567   50   0  0      110  254   0       0     159     0     0.0     2  0    2
## 568   41   1  2      130  214   0       0     168     0     2.0     1  0    2
## 569   54   0  2      160  201   0       1     163     0     0.0     2  1    2
## 570   42   1  2      120  240   1       1     194     0     0.8     0  0    3
## 571   54   0  2      135  304   1       1     170     0     0.0     2  0    2
## 572   60   1  0      145  282   0       0     142     1     2.8     1  2    3
## 573   34   1  3      118  182   0       0     174     0     0.0     2  0    2
## 574   44   1  0      112  290   0       0     153     0     0.0     2  1    2
## 575   60   1  0      125  258   0       0     141     1     2.8     1  1    3
## 576   43   1  0      150  247   0       1     171     0     1.5     2  0    2
## 577   52   1  3      152  298   1       1     178     0     1.2     1  0    3
## 578   70   1  0      130  322   0       0     109     0     2.4     1  3    2
## 579   62   0  0      140  394   0       0     157     0     1.2     1  0    2
## 580   58   1  0      146  218   0       1     105     0     2.0     1  1    3
## 581   46   1  1      101  197   1       1     156     0     0.0     2  0    3
## 582   44   1  2      140  235   0       0     180     0     0.0     2  0    2
## 583   55   1  1      130  262   0       1     155     0     0.0     2  0    2
## 584   43   1  0      120  177   0       0     120     1     2.5     1  0    3
## 585   55   1  0      132  353   0       1     132     1     1.2     1  1    3
## 586   40   1  3      140  199   0       1     178     1     1.4     2  0    3
## 587   64   1  2      125  309   0       1     131     1     1.8     1  0    3
## 588   59   1  0      164  176   1       0      90     0     1.0     1  2    1
## 589   61   0  0      145  307   0       0     146     1     1.0     1  0    3
## 590   54   1  0      122  286   0       0     116     1     3.2     1  2    2
## 591   74   0  1      120  269   0       0     121     1     0.2     2  1    2
## 592   63   0  0      108  269   0       1     169     1     1.8     1  2    2
## 593   70   1  2      160  269   0       1     112     1     2.9     1  1    3
## 594   63   0  0      108  269   0       1     169     1     1.8     1  2    2
## 595   64   1  0      145  212   0       0     132     0     2.0     1  2    1
## 596   61   1  0      148  203   0       1     161     0     0.0     2  1    3
## 597   59   1  1      140  221   0       1     164     1     0.0     2  0    2
## 598   38   1  2      138  175   0       1     173     0     0.0     2  4    2
## 599   58   1  1      120  284   0       0     160     0     1.8     1  0    2
## 600   63   0  1      140  195   0       1     179     0     0.0     2  2    2
## 601   62   0  2      130  263   0       1      97     0     1.2     1  1    3
## 602   46   1  0      140  311   0       1     120     1     1.8     1  2    3
## 603   58   0  2      120  340   0       1     172     0     0.0     2  0    2
## 604   63   0  1      140  195   0       1     179     0     0.0     2  2    2
## 605   47   1  2      130  253   0       1     179     0     0.0     2  0    2
## 606   71   0  2      110  265   1       0     130     0     0.0     2  1    2
## 607   66   1  0      112  212   0       0     132     1     0.1     2  1    2
## 608   42   1  0      136  315   0       1     125     1     1.8     1  0    1
## 609   64   1  0      145  212   0       0     132     0     2.0     1  2    1
## 610   55   0  0      180  327   0       2     117     1     3.4     1  0    2
## 611   43   0  0      132  341   1       0     136     1     3.0     1  0    3
## 612   55   0  0      128  205   0       2     130     1     2.0     1  1    3
## 613   58   0  0      170  225   1       0     146     1     2.8     1  2    1
## 614   55   1  0      140  217   0       1     111     1     5.6     0  0    3
## 615   51   0  0      130  305   0       1     142     1     1.2     1  0    3
## 616   50   0  2      120  219   0       1     158     0     1.6     1  0    2
## 617   43   1  0      115  303   0       1     181     0     1.2     1  0    2
## 618   41   0  1      126  306   0       1     163     0     0.0     2  0    2
## 619   49   1  1      130  266   0       1     171     0     0.6     2  0    2
## 620   65   1  0      110  248   0       0     158     0     0.6     2  2    1
## 621   57   1  0      152  274   0       1      88     1     1.2     1  1    3
## 622   48   1  0      130  256   1       0     150     1     0.0     2  2    3
## 623   62   0  0      138  294   1       1     106     0     1.9     1  3    2
## 624   61   1  3      134  234   0       1     145     0     2.6     1  2    2
## 625   59   1  3      178  270   0       0     145     0     4.2     0  0    3
## 626   69   1  2      140  254   0       0     146     0     2.0     1  3    3
## 627   58   1  2      132  224   0       0     173     0     3.2     2  2    3
## 628   38   1  3      120  231   0       1     182     1     3.8     1  0    3
## 629   69   0  3      140  239   0       1     151     0     1.8     2  2    2
## 630   65   1  3      138  282   1       0     174     0     1.4     1  1    2
## 631   45   1  3      110  264   0       1     132     0     1.2     1  0    3
## 632   49   1  1      130  266   0       1     171     0     0.6     2  0    2
## 633   45   0  1      130  234   0       0     175     0     0.6     1  0    2
## 634   61   1  0      138  166   0       0     125     1     3.6     1  1    2
## 635   52   1  0      125  212   0       1     168     0     1.0     2  2    3
## 636   53   0  0      130  264   0       0     143     0     0.4     1  0    2
## 637   59   0  0      174  249   0       1     143     1     0.0     1  0    2
## 638   58   0  2      120  340   0       1     172     0     0.0     2  0    2
## 639   65   1  3      138  282   1       0     174     0     1.4     1  1    2
## 640   58   0  0      130  197   0       1     131     0     0.6     1  0    2
## 641   46   0  0      138  243   0       0     152     1     0.0     1  0    2
## 642   56   0  0      134  409   0       0     150     1     1.9     1  2    3
## 643   64   1  0      128  263   0       1     105     1     0.2     1  1    3
## 644   65   1  0      120  177   0       1     140     0     0.4     2  0    3
## 645   44   1  2      120  226   0       1     169     0     0.0     2  0    2
## 646   50   1  0      150  243   0       0     128     0     2.6     1  0    3
## 647   47   1  2      108  243   0       1     152     0     0.0     2  0    2
## 648   64   0  0      130  303   0       1     122     0     2.0     1  2    2
## 649   71   0  0      112  149   0       1     125     0     1.6     1  0    2
## 650   45   0  1      130  234   0       0     175     0     0.6     1  0    2
## 651   62   1  0      120  267   0       1      99     1     1.8     1  2    3
## 652   41   1  1      120  157   0       1     182     0     0.0     2  0    2
## 653   66   0  3      150  226   0       1     114     0     2.6     0  0    2
## 654   56   1  0      130  283   1       0     103     1     1.6     0  0    3
## 655   41   0  1      126  306   0       1     163     0     0.0     2  0    2
## 656   41   1  1      110  235   0       1     153     0     0.0     2  0    2
## 657   57   0  1      130  236   0       0     174     0     0.0     1  1    2
## 658   39   0  2      138  220   0       1     152     0     0.0     1  0    2
## 659   64   1  2      125  309   0       1     131     1     1.8     1  0    3
## 660   59   1  0      138  271   0       0     182     0     0.0     2  0    2
## 661   61   1  0      138  166   0       0     125     1     3.6     1  1    2
## 662   58   1  0      114  318   0       2     140     0     4.4     0  3    1
## 663   47   1  0      112  204   0       1     143     0     0.1     2  0    2
## 664   58   0  0      100  248   0       0     122     0     1.0     1  0    2
## 665   66   0  3      150  226   0       1     114     0     2.6     0  0    2
## 666   65   0  2      140  417   1       0     157     0     0.8     2  1    2
## 667   35   1  1      122  192   0       1     174     0     0.0     2  0    2
## 668   57   1  1      124  261   0       1     141     0     0.3     2  0    3
## 669   29   1  1      130  204   0       0     202     0     0.0     2  0    2
## 670   66   1  1      160  246   0       1     120     1     0.0     1  3    1
## 671   61   0  0      130  330   0       0     169     0     0.0     2  0    2
## 672   52   1  0      125  212   0       1     168     0     1.0     2  2    3
## 673   68   1  2      118  277   0       1     151     0     1.0     2  1    3
## 674   54   1  2      120  258   0       0     147     0     0.4     1  0    3
## 675   63   1  0      130  330   1       0     132     1     1.8     2  3    3
## 676   58   1  0      100  234   0       1     156     0     0.1     2  1    3
## 677   60   1  0      130  253   0       1     144     1     1.4     2  1    3
## 678   63   1  0      130  254   0       0     147     0     1.4     1  1    3
## 679   41   0  2      112  268   0       0     172     1     0.0     2  0    2
## 680   68   1  2      180  274   1       0     150     1     1.6     1  0    3
## 681   42   1  1      120  295   0       1     162     0     0.0     2  0    2
## 682   59   1  0      170  326   0       0     140     1     3.4     0  0    3
## 683   59   1  0      164  176   1       0      90     0     1.0     1  2    1
## 684   43   1  0      120  177   0       0     120     1     2.5     1  0    3
## 685   60   1  2      140  185   0       0     155     0     3.0     1  0    2
## 686   63   0  0      150  407   0       0     154     0     4.0     1  3    3
## 687   52   1  0      128  204   1       1     156     1     1.0     1  0    0
## 688   58   1  0      125  300   0       0     171     0     0.0     2  2    3
## 689   56   0  0      200  288   1       0     133     1     4.0     0  2    3
## 690   54   0  2      135  304   1       1     170     0     0.0     2  0    2
## 691   58   1  2      105  240   0       0     154     1     0.6     1  0    3
## 692   55   0  1      135  250   0       0     161     0     1.4     1  0    2
## 693   53   1  0      140  203   1       0     155     1     3.1     0  0    3
## 694   63   0  1      140  195   0       1     179     0     0.0     2  2    2
## 695   39   1  0      118  219   0       1     140     0     1.2     1  0    3
## 696   35   1  0      126  282   0       0     156     1     0.0     2  0    3
## 697   50   0  2      120  219   0       1     158     0     1.6     1  0    2
## 698   67   1  2      152  212   0       0     150     0     0.8     1  0    3
## 699   66   1  0      112  212   0       0     132     1     0.1     2  1    2
## 700   35   1  0      126  282   0       0     156     1     0.0     2  0    3
## 701   41   1  2      130  214   0       0     168     0     2.0     1  0    2
## 702   35   1  0      120  198   0       1     130     1     1.6     1  0    3
## 703   71   0  1      160  302   0       1     162     0     0.4     2  2    2
## 704   57   1  0      110  201   0       1     126     1     1.5     1  0    1
## 705   51   1  2       94  227   0       1     154     1     0.0     2  1    3
## 706   58   1  0      128  216   0       0     131     1     2.2     1  3    3
## 707   57   1  2      128  229   0       0     150     0     0.4     1  1    3
## 708   56   0  1      140  294   0       0     153     0     1.3     1  0    2
## 709   60   0  2      120  178   1       1      96     0     0.0     2  0    2
## 710   45   1  3      110  264   0       1     132     0     1.2     1  0    3
## 711   56   1  1      130  221   0       0     163     0     0.0     2  0    3
## 712   35   1  0      120  198   0       1     130     1     1.6     1  0    3
## 713   45   0  1      112  160   0       1     138     0     0.0     1  0    2
## 714   66   0  3      150  226   0       1     114     0     2.6     0  0    2
## 715   51   1  3      125  213   0       0     125     1     1.4     2  1    2
## 716   70   1  1      156  245   0       0     143     0     0.0     2  0    2
## 717   55   0  0      128  205   0       2     130     1     2.0     1  1    3
## 718   56   1  2      130  256   1       0     142     1     0.6     1  1    1
## 719   55   0  1      135  250   0       0     161     0     1.4     1  0    2
## 720   52   1  0      108  233   1       1     147     0     0.1     2  3    3
## 721   64   1  2      140  335   0       1     158     0     0.0     2  0    2
## 722   45   1  0      115  260   0       0     185     0     0.0     2  0    2
## 723   67   0  2      152  277   0       1     172     0     0.0     2  1    2
## 724   68   0  2      120  211   0       0     115     0     1.5     1  0    2
## 725   74   0  1      120  269   0       0     121     1     0.2     2  1    2
## 726   60   0  0      150  258   0       0     157     0     2.6     1  2    3
## 727   48   1  0      124  274   0       0     166     0     0.5     1  0    3
## 728   56   1  1      130  221   0       0     163     0     0.0     2  0    3
## 729   46   1  0      140  311   0       1     120     1     1.8     1  2    3
## 730   55   0  1      135  250   0       0     161     0     1.4     1  0    2
## 731   44   1  1      120  220   0       1     170     0     0.0     2  0    2
## 732   52   1  0      112  230   0       1     160     0     0.0     2  1    2
## 733   51   1  2       94  227   0       1     154     1     0.0     2  1    3
## 734   44   0  2      108  141   0       1     175     0     0.6     1  0    2
## 735   52   1  0      128  204   1       1     156     1     1.0     1  0    0
## 736   50   1  2      129  196   0       1     163     0     0.0     2  0    2
## 737   59   1  0      110  239   0       0     142     1     1.2     1  1    3
## 738   67   1  0      120  229   0       0     129     1     2.6     1  2    3
## 739   58   1  0      125  300   0       0     171     0     0.0     2  2    3
## 740   52   1  0      128  255   0       1     161     1     0.0     2  1    3
## 741   44   1  2      140  235   0       0     180     0     0.0     2  0    2
## 742   41   0  2      112  268   0       0     172     1     0.0     2  0    2
## 743   63   1  0      130  330   1       0     132     1     1.8     2  3    3
## 744   58   1  1      125  220   0       1     144     0     0.4     1  4    3
## 745   60   0  2      102  318   0       1     160     0     0.0     2  1    2
## 746   51   1  2      100  222   0       1     143     1     1.2     1  0    2
## 747   64   1  2      140  335   0       1     158     0     0.0     2  0    2
## 748   60   1  0      117  230   1       1     160     1     1.4     2  2    3
## 749   44   1  2      120  226   0       1     169     0     0.0     2  0    2
## 750   58   1  1      125  220   0       1     144     0     0.4     1  4    3
## 751   55   1  1      130  262   0       1     155     0     0.0     2  0    2
## 752   65   0  2      160  360   0       0     151     0     0.8     2  0    2
## 753   48   1  1      130  245   0       0     180     0     0.2     1  0    2
## 754   65   1  0      120  177   0       1     140     0     0.4     2  0    3
## 755   51   0  2      130  256   0       0     149     0     0.5     2  0    2
## 756   48   1  2      124  255   1       1     175     0     0.0     2  2    2
## 757   64   1  0      120  246   0       0      96     1     2.2     0  1    2
## 758   66   1  0      160  228   0       0     138     0     2.3     2  0    1
## 759   46   0  1      105  204   0       1     172     0     0.0     2  0    2
## 760   61   0  0      130  330   0       0     169     0     0.0     2  0    2
## 761   57   1  0      150  276   0       0     112     1     0.6     1  1    1
## 762   49   0  0      130  269   0       1     163     0     0.0     2  0    2
## 763   56   1  1      130  221   0       0     163     0     0.0     2  0    3
## 764   58   0  3      150  283   1       0     162     0     1.0     2  0    2
## 765   63   1  0      140  187   0       0     144     1     4.0     2  2    3
## 766   57   1  0      110  335   0       1     143     1     3.0     1  1    3
## 767   57   1  0      110  335   0       1     143     1     3.0     1  1    3
## 768   68   1  0      144  193   1       1     141     0     3.4     1  2    3
## 769   46   1  1      101  197   1       1     156     0     0.0     2  0    3
## 770   71   0  2      110  265   1       0     130     0     0.0     2  1    2
## 771   41   1  1      135  203   0       1     132     0     0.0     1  0    1
## 772   45   0  0      138  236   0       0     152     1     0.2     1  0    2
## 773   62   0  0      150  244   0       1     154     1     1.4     1  0    2
## 774   65   0  0      150  225   0       0     114     0     1.0     1  3    3
## 775   48   0  2      130  275   0       1     139     0     0.2     2  0    2
## 776   51   1  2      100  222   0       1     143     1     1.2     1  0    2
## 777   61   0  0      145  307   0       0     146     1     1.0     1  0    3
## 778   53   1  0      123  282   0       1      95     1     2.0     1  2    3
## 779   59   1  3      134  204   0       1     162     0     0.8     2  2    2
## 780   34   0  1      118  210   0       1     192     0     0.7     2  0    2
## 781   44   1  0      120  169   0       1     144     1     2.8     0  0    1
## 782   58   1  0      146  218   0       1     105     0     2.0     1  1    3
## 783   64   0  0      130  303   0       1     122     0     2.0     1  2    2
## 784   56   1  1      120  240   0       1     169     0     0.0     0  0    2
## 785   54   1  2      150  232   0       0     165     0     1.6     2  0    3
## 786   55   1  0      160  289   0       0     145     1     0.8     1  1    3
## 787   67   1  0      125  254   1       1     163     0     0.2     1  2    3
## 788   51   1  0      140  298   0       1     122     1     4.2     1  3    3
## 789   62   0  0      138  294   1       1     106     0     1.9     1  3    2
## 790   62   1  1      120  281   0       0     103     0     1.4     1  1    3
## 791   54   1  0      110  239   0       1     126     1     2.8     1  1    3
## 792   54   1  0      110  239   0       1     126     1     2.8     1  1    3
## 793   68   1  0      144  193   1       1     141     0     3.4     1  2    3
## 794   60   0  2      120  178   1       1      96     0     0.0     2  0    2
## 795   61   1  3      134  234   0       1     145     0     2.6     1  2    2
## 796   62   1  1      128  208   1       0     140     0     0.0     2  0    2
## 797   41   1  1      135  203   0       1     132     0     0.0     1  0    1
## 798   65   0  0      150  225   0       0     114     0     1.0     1  3    3
## 799   59   1  3      170  288   0       0     159     0     0.2     1  0    3
## 800   43   1  0      115  303   0       1     181     0     1.2     1  0    2
## 801   67   1  0      120  229   0       0     129     1     2.6     1  2    3
## 802   63   1  3      145  233   1       0     150     0     2.3     0  0    1
## 803   63   0  0      124  197   0       1     136     1     0.0     1  0    2
## 804   52   1  0      112  230   0       1     160     0     0.0     2  1    2
## 805   58   0  0      130  197   0       1     131     0     0.6     1  0    2
## 806   53   1  0      142  226   0       0     111     1     0.0     2  0    3
## 807   57   1  0      150  276   0       0     112     1     0.6     1  1    1
## 808   44   1  2      130  233   0       1     179     1     0.4     2  0    2
## 809   51   1  2       94  227   0       1     154     1     0.0     2  1    3
## 810   54   0  2      110  214   0       1     158     0     1.6     1  0    2
## 811   40   1  0      110  167   0       0     114     1     2.0     1  0    3
## 812   57   1  1      124  261   0       1     141     0     0.3     2  0    3
## 813   62   0  0      140  268   0       0     160     0     3.6     0  2    2
## 814   53   1  0      140  203   1       0     155     1     3.1     0  0    3
## 815   62   1  1      128  208   1       0     140     0     0.0     2  0    2
## 816   58   1  2      105  240   0       0     154     1     0.6     1  0    3
## 817   70   1  1      156  245   0       0     143     0     0.0     2  0    2
## 818   45   1  0      115  260   0       0     185     0     0.0     2  0    2
## 819   42   1  3      148  244   0       0     178     0     0.8     2  2    2
## 820   58   0  0      170  225   1       0     146     1     2.8     1  2    1
## 821   61   1  0      140  207   0       0     138     1     1.9     2  1    3
## 822   62   0  0      140  268   0       0     160     0     3.6     0  2    2
## 823   60   1  0      130  253   0       1     144     1     1.4     2  1    3
## 824   54   1  0      140  239   0       1     160     0     1.2     2  0    2
## 825   61   1  0      138  166   0       0     125     1     3.6     1  1    2
## 826   63   0  2      135  252   0       0     172     0     0.0     2  0    2
## 827   42   1  2      130  180   0       1     150     0     0.0     2  0    2
## 828   57   1  2      128  229   0       0     150     0     0.4     1  1    3
## 829   44   1  2      130  233   0       1     179     1     0.4     2  0    2
## 830   54   1  0      124  266   0       0     109     1     2.2     1  1    3
## 831   51   1  2      100  222   0       1     143     1     1.2     1  0    2
## 832   58   1  1      125  220   0       1     144     0     0.4     1  4    3
## 833   68   1  2      118  277   0       1     151     0     1.0     2  1    3
## 834   55   1  0      140  217   0       1     111     1     5.6     0  0    3
## 835   42   1  0      136  315   0       1     125     1     1.8     1  0    1
## 836   49   1  2      118  149   0       0     126     0     0.8     2  3    2
## 837   53   0  0      138  234   0       0     160     0     0.0     2  0    2
## 838   52   1  2      172  199   1       1     162     0     0.5     2  0    3
## 839   51   1  3      125  213   0       0     125     1     1.4     2  1    2
## 840   51   1  0      140  261   0       0     186     1     0.0     2  0    2
## 841   70   1  0      145  174   0       1     125     1     2.6     0  0    3
## 842   35   0  0      138  183   0       1     182     0     1.4     2  0    2
## 843   58   1  2      112  230   0       0     165     0     2.5     1  1    3
## 844   59   1  3      160  273   0       0     125     0     0.0     2  0    2
## 845   60   1  0      140  293   0       0     170     0     1.2     1  2    3
## 846   56   1  0      132  184   0       0     105     1     2.1     1  1    1
## 847   35   0  0      138  183   0       1     182     0     1.4     2  0    2
## 848   61   1  0      138  166   0       0     125     1     3.6     1  1    2
## 849   58   0  3      150  283   1       0     162     0     1.0     2  0    2
## 850   52   1  0      128  255   0       1     161     1     0.0     2  1    3
## 851   58   1  1      120  284   0       0     160     0     1.8     1  0    2
## 852   37   1  2      130  250   0       1     187     0     3.5     0  0    2
## 853   52   1  0      128  255   0       1     161     1     0.0     2  1    3
## 854   67   1  0      120  229   0       0     129     1     2.6     1  2    3
## 855   65   1  3      138  282   1       0     174     0     1.4     1  1    2
## 856   46   1  1      101  197   1       1     156     0     0.0     2  0    3
## 857   68   0  2      120  211   0       0     115     0     1.5     1  0    2
## 858   43   1  0      115  303   0       1     181     0     1.2     1  0    2
## 859   68   0  2      120  211   0       0     115     0     1.5     1  0    2
## 860   51   1  0      140  299   0       1     173     1     1.6     2  0    3
## 861   52   1  0      112  230   0       1     160     0     0.0     2  1    2
## 862   64   1  2      140  335   0       1     158     0     0.0     2  0    2
## 863   59   1  3      170  288   0       0     159     0     0.2     1  0    3
## 864   52   1  0      125  212   0       1     168     0     1.0     2  2    3
## 865   59   1  3      160  273   0       0     125     0     0.0     2  0    2
## 866   60   0  3      150  240   0       1     171     0     0.9     2  0    2
## 867   41   1  2      112  250   0       1     179     0     0.0     2  0    2
## 868   41   1  1      110  235   0       1     153     0     0.0     2  0    2
## 869   56   1  1      120  240   0       1     169     0     0.0     0  0    2
## 870   56   1  1      120  236   0       1     178     0     0.8     2  0    2
## 871   48   0  2      130  275   0       1     139     0     0.2     2  0    2
## 872   39   1  2      140  321   0       0     182     0     0.0     2  0    2
## 873   64   1  3      170  227   0       0     155     0     0.6     1  0    3
## 874   57   1  0      140  192   0       1     148     0     0.4     1  0    1
## 875   59   1  3      160  273   0       0     125     0     0.0     2  0    2
## 876   60   1  0      130  206   0       0     132     1     2.4     1  2    3
## 877   61   1  0      140  207   0       0     138     1     1.9     2  1    3
## 878   43   0  2      122  213   0       1     165     0     0.2     1  0    2
## 879   54   1  0      120  188   0       1     113     0     1.4     1  1    3
## 880   59   1  0      138  271   0       0     182     0     0.0     2  0    2
## 881   57   1  0      132  207   0       1     168     1     0.0     2  0    3
## 882   57   1  1      154  232   0       0     164     0     0.0     2  1    2
## 883   57   1  0      130  131   0       1     115     1     1.2     1  1    3
## 884   48   1  0      124  274   0       0     166     0     0.5     1  0    3
## 885   70   1  0      145  174   0       1     125     1     2.6     0  0    3
## 886   57   1  0      165  289   1       0     124     0     1.0     1  3    3
## 887   61   1  0      120  260   0       1     140     1     3.6     1  1    3
## 888   57   1  0      110  201   0       1     126     1     1.5     1  0    1
## 889   60   0  0      150  258   0       0     157     0     2.6     1  2    3
## 890   63   0  0      150  407   0       0     154     0     4.0     1  3    3
## 891   55   0  0      128  205   0       2     130     1     2.0     1  1    3
## 892   64   0  0      180  325   0       1     154     1     0.0     2  0    2
## 893   54   1  0      110  239   0       1     126     1     2.8     1  1    3
## 894   52   1  0      128  204   1       1     156     1     1.0     1  0    0
## 895   51   1  0      140  299   0       1     173     1     1.6     2  0    3
## 896   62   0  2      130  263   0       1      97     0     1.2     1  1    3
## 897   59   1  3      178  270   0       0     145     0     4.2     0  0    3
## 898   52   1  1      134  201   0       1     158     0     0.8     2  1    2
## 899   42   0  0      102  265   0       0     122     0     0.6     1  0    2
## 900   59   1  0      135  234   0       1     161     0     0.5     1  0    3
## 901   61   1  3      134  234   0       1     145     0     2.6     1  2    2
## 902   42   0  0      102  265   0       0     122     0     0.6     1  0    2
## 903   62   0  0      140  268   0       0     160     0     3.6     0  2    2
## 904   59   1  2      126  218   1       1     134     0     2.2     1  1    1
## 905   55   1  1      130  262   0       1     155     0     0.0     2  0    2
## 906   64   1  0      120  246   0       0      96     1     2.2     0  1    2
## 907   42   1  0      140  226   0       1     178     0     0.0     2  0    2
## 908   50   0  1      120  244   0       1     162     0     1.1     2  0    2
## 909   62   1  0      120  267   0       1      99     1     1.8     1  2    3
## 910   50   1  0      144  200   0       0     126     1     0.9     1  0    3
## 911   50   1  2      140  233   0       1     163     0     0.6     1  1    3
## 912   58   0  1      136  319   1       0     152     0     0.0     2  2    2
## 913   35   1  0      120  198   0       1     130     1     1.6     1  0    3
## 914   45   1  0      104  208   0       0     148     1     3.0     1  0    2
## 915   66   1  0      112  212   0       0     132     1     0.1     2  1    2
## 916   46   1  0      120  249   0       0     144     0     0.8     2  0    3
## 917   65   1  0      135  254   0       0     127     0     2.8     1  1    3
## 918   47   1  2      130  253   0       1     179     0     0.0     2  0    2
## 919   59   1  3      134  204   0       1     162     0     0.8     2  2    2
## 920   38   1  3      120  231   0       1     182     1     3.8     1  0    3
## 921   39   1  0      118  219   0       1     140     0     1.2     1  0    3
## 922   58   1  0      146  218   0       1     105     0     2.0     1  1    3
## 923   44   1  1      120  263   0       1     173     0     0.0     2  0    3
## 924   54   1  0      140  239   0       1     160     0     1.2     2  0    2
## 925   61   0  0      130  330   0       0     169     0     0.0     2  0    2
## 926   57   1  0      130  131   0       1     115     1     1.2     1  1    3
## 927   54   1  0      110  206   0       0     108     1     0.0     1  1    2
## 928   42   1  2      120  240   1       1     194     0     0.8     0  0    3
## 929   54   1  0      124  266   0       0     109     1     2.2     1  1    3
## 930   60   1  0      130  206   0       0     132     1     2.4     1  2    3
## 931   65   1  0      135  254   0       0     127     0     2.8     1  1    3
## 932   40   1  0      152  223   0       1     181     0     0.0     2  0    3
## 933   51   0  2      140  308   0       0     142     0     1.5     2  1    2
## 934   38   1  3      120  231   0       1     182     1     3.8     1  0    3
## 935   42   1  2      130  180   0       1     150     0     0.0     2  0    2
## 936   56   1  1      120  240   0       1     169     0     0.0     0  0    2
## 937   43   1  2      130  315   0       1     162     0     1.9     2  1    2
## 938   64   1  2      140  335   0       1     158     0     0.0     2  0    2
## 939   53   1  0      142  226   0       0     111     1     0.0     2  0    3
## 940   49   0  1      134  271   0       1     162     0     0.0     1  0    2
## 941   57   0  0      140  241   0       1     123     1     0.2     1  0    3
## 942   52   0  2      136  196   0       0     169     0     0.1     1  0    2
## 943   69   0  3      140  239   0       1     151     0     1.8     2  2    2
## 944   65   1  0      120  177   0       1     140     0     0.4     2  0    3
## 945   66   0  0      178  228   1       1     165     1     1.0     1  2    3
## 946   56   1  3      120  193   0       0     162     0     1.9     1  0    3
## 947   67   0  2      152  277   0       1     172     0     0.0     2  1    2
## 948   54   0  2      160  201   0       1     163     0     0.0     2  1    2
## 949   70   1  0      145  174   0       1     125     1     2.6     0  0    3
## 950   57   1  0      132  207   0       1     168     1     0.0     2  0    3
## 951   67   1  0      160  286   0       0     108     1     1.5     1  3    2
## 952   62   0  2      130  263   0       1      97     0     1.2     1  1    3
## 953   54   0  2      135  304   1       1     170     0     0.0     2  0    2
## 954   45   0  0      138  236   0       0     152     1     0.2     1  0    2
## 955   53   0  0      130  264   0       0     143     0     0.4     1  0    2
## 956   62   1  2      130  231   0       1     146     0     1.8     1  3    3
## 957   49   0  0      130  269   0       1     163     0     0.0     2  0    2
## 958   50   1  2      140  233   0       1     163     0     0.6     1  1    3
## 959   65   0  2      140  417   1       0     157     0     0.8     2  1    2
## 960   69   0  3      140  239   0       1     151     0     1.8     2  2    2
## 961   52   0  2      136  196   0       0     169     0     0.1     1  0    2
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# load the tidyverse package
library(tidyverse)
## ── Attaching core tidyverse packages ──────────────────────── tidyverse 2.0.0 ──
## ✔ forcats   1.0.0     ✔ stringr   1.5.0
## ✔ lubridate 1.9.2     ✔ tibble    3.2.1
## ✔ purrr     1.0.1     
## ── Conflicts ────────────────────────────────────────── tidyverse_conflicts() ──
## ✖ dplyr::filter() masks stats::filter()
## ✖ dplyr::lag()    masks stats::lag()
## ℹ Use the conflicted package (<http://conflicted.r-lib.org/>) to force all conflicts to become errors
# recode sex using mutate function and save as hd_data
Heart %>% mutate(sex = factor(sex, levels = 0:1, labels = c("Female", "Male")))-> Heart
Heart
##      age    sex cp trestbps chol fbs restecg thalach exang oldpeak slope ca
## 1     52   Male  0      125  212   0       1     168     0     1.0     2  2
## 2     53   Male  0      140  203   1       0     155     1     3.1     0  0
## 3     70   Male  0      145  174   0       1     125     1     2.6     0  0
## 4     61   Male  0      148  203   0       1     161     0     0.0     2  1
## 5     62 Female  0      138  294   1       1     106     0     1.9     1  3
## 6     58 Female  0      100  248   0       0     122     0     1.0     1  0
## 7     58   Male  0      114  318   0       2     140     0     4.4     0  3
## 8     55   Male  0      160  289   0       0     145     1     0.8     1  1
## 9     46   Male  0      120  249   0       0     144     0     0.8     2  0
## 10    54   Male  0      122  286   0       0     116     1     3.2     1  2
## 11    71 Female  0      112  149   0       1     125     0     1.6     1  0
## 12    43 Female  0      132  341   1       0     136     1     3.0     1  0
## 13    34 Female  1      118  210   0       1     192     0     0.7     2  0
## 14    51   Male  0      140  298   0       1     122     1     4.2     1  3
## 15    52   Male  0      128  204   1       1     156     1     1.0     1  0
## 16    34 Female  1      118  210   0       1     192     0     0.7     2  0
## 17    51 Female  2      140  308   0       0     142     0     1.5     2  1
## 18    54   Male  0      124  266   0       0     109     1     2.2     1  1
## 19    50 Female  1      120  244   0       1     162     0     1.1     2  0
## 20    58   Male  2      140  211   1       0     165     0     0.0     2  0
## 21    60   Male  2      140  185   0       0     155     0     3.0     1  0
## 22    67 Female  0      106  223   0       1     142     0     0.3     2  2
## 23    45   Male  0      104  208   0       0     148     1     3.0     1  0
## 24    63 Female  2      135  252   0       0     172     0     0.0     2  0
## 25    42 Female  2      120  209   0       1     173     0     0.0     1  0
## 26    61 Female  0      145  307   0       0     146     1     1.0     1  0
## 27    44   Male  2      130  233   0       1     179     1     0.4     2  0
## 28    58 Female  1      136  319   1       0     152     0     0.0     2  2
## 29    56   Male  2      130  256   1       0     142     1     0.6     1  1
## 30    55 Female  0      180  327   0       2     117     1     3.4     1  0
## 31    44   Male  0      120  169   0       1     144     1     2.8     0  0
## 32    50 Female  1      120  244   0       1     162     0     1.1     2  0
## 33    57   Male  0      130  131   0       1     115     1     1.2     1  1
## 34    70   Male  2      160  269   0       1     112     1     2.9     1  1
## 35    50   Male  2      129  196   0       1     163     0     0.0     2  0
## 36    46   Male  2      150  231   0       1     147     0     3.6     1  0
## 37    51   Male  3      125  213   0       0     125     1     1.4     2  1
## 38    59   Male  0      138  271   0       0     182     0     0.0     2  0
## 39    64   Male  0      128  263   0       1     105     1     0.2     1  1
## 40    57   Male  2      128  229   0       0     150     0     0.4     1  1
## 41    65 Female  2      160  360   0       0     151     0     0.8     2  0
## 42    54   Male  2      120  258   0       0     147     0     0.4     1  0
## 43    61 Female  0      130  330   0       0     169     0     0.0     2  0
## 44    46   Male  0      120  249   0       0     144     0     0.8     2  0
## 45    55 Female  1      132  342   0       1     166     0     1.2     2  0
## 46    42   Male  0      140  226   0       1     178     0     0.0     2  0
## 47    41   Male  1      135  203   0       1     132     0     0.0     1  0
## 48    66 Female  0      178  228   1       1     165     1     1.0     1  2
## 49    66 Female  2      146  278   0       0     152     0     0.0     1  1
## 50    60   Male  0      117  230   1       1     160     1     1.4     2  2
## 51    58 Female  3      150  283   1       0     162     0     1.0     2  0
## 52    57 Female  0      140  241   0       1     123     1     0.2     1  0
## 53    38   Male  2      138  175   0       1     173     0     0.0     2  4
## 54    49   Male  2      120  188   0       1     139     0     2.0     1  3
## 55    55   Male  0      140  217   0       1     111     1     5.6     0  0
## 56    55   Male  0      140  217   0       1     111     1     5.6     0  0
## 57    56   Male  3      120  193   0       0     162     0     1.9     1  0
## 58    48   Male  1      130  245   0       0     180     0     0.2     1  0
## 59    67   Male  2      152  212   0       0     150     0     0.8     1  0
## 60    57   Male  1      154  232   0       0     164     0     0.0     2  1
## 61    29   Male  1      130  204   0       0     202     0     0.0     2  0
## 62    66 Female  2      146  278   0       0     152     0     0.0     1  1
## 63    67   Male  0      100  299   0       0     125     1     0.9     1  2
## 64    59   Male  2      150  212   1       1     157     0     1.6     2  0
## 65    29   Male  1      130  204   0       0     202     0     0.0     2  0
## 66    59   Male  3      170  288   0       0     159     0     0.2     1  0
## 67    53   Male  2      130  197   1       0     152     0     1.2     0  0
## 68    42   Male  0      136  315   0       1     125     1     1.8     1  0
## 69    37 Female  2      120  215   0       1     170     0     0.0     2  0
## 70    62 Female  0      160  164   0       0     145     0     6.2     0  3
## 71    59   Male  0      170  326   0       0     140     1     3.4     0  0
## 72    61   Male  0      140  207   0       0     138     1     1.9     2  1
## 73    56   Male  0      125  249   1       0     144     1     1.2     1  1
## 74    59   Male  0      140  177   0       1     162     1     0.0     2  1
## 75    48   Male  0      130  256   1       0     150     1     0.0     2  2
## 76    47   Male  2      138  257   0       0     156     0     0.0     2  0
## 77    48   Male  2      124  255   1       1     175     0     0.0     2  2
## 78    63   Male  0      140  187   0       0     144     1     4.0     2  2
## 79    52   Male  1      134  201   0       1     158     0     0.8     2  1
## 80    52   Male  1      134  201   0       1     158     0     0.8     2  1
## 81    50   Male  2      140  233   0       1     163     0     0.6     1  1
## 82    49   Male  2      118  149   0       0     126     0     0.8     2  3
## 83    46   Male  2      150  231   0       1     147     0     3.6     1  0
## 84    38   Male  2      138  175   0       1     173     0     0.0     2  4
## 85    37 Female  2      120  215   0       1     170     0     0.0     2  0
## 86    44   Male  1      120  220   0       1     170     0     0.0     2  0
## 87    58   Male  2      140  211   1       0     165     0     0.0     2  0
## 88    59 Female  0      174  249   0       1     143     1     0.0     1  0
## 89    62 Female  0      140  268   0       0     160     0     3.6     0  2
## 90    68   Male  0      144  193   1       1     141     0     3.4     1  2
## 91    54 Female  2      108  267   0       0     167     0     0.0     2  0
## 92    62 Female  0      124  209   0       1     163     0     0.0     2  0
## 93    63   Male  0      140  187   0       0     144     1     4.0     2  2
## 94    44   Male  0      120  169   0       1     144     1     2.8     0  0
## 95    62   Male  1      128  208   1       0     140     0     0.0     2  0
## 96    45 Female  0      138  236   0       0     152     1     0.2     1  0
## 97    57 Female  0      128  303   0       0     159     0     0.0     2  1
## 98    53   Male  0      123  282   0       1      95     1     2.0     1  2
## 99    65   Male  0      110  248   0       0     158     0     0.6     2  2
## 100   76 Female  2      140  197   0       2     116     0     1.1     1  0
## 101   43 Female  2      122  213   0       1     165     0     0.2     1  0
## 102   57   Male  2      150  126   1       1     173     0     0.2     2  1
## 103   54   Male  1      108  309   0       1     156     0     0.0     2  0
## 104   47   Male  2      138  257   0       0     156     0     0.0     2  0
## 105   52   Male  3      118  186   0       0     190     0     0.0     1  0
## 106   47   Male  0      110  275   0       0     118     1     1.0     1  1
## 107   51   Male  0      140  299   0       1     173     1     1.6     2  0
## 108   62   Male  1      120  281   0       0     103     0     1.4     1  1
## 109   40   Male  0      152  223   0       1     181     0     0.0     2  0
## 110   54   Male  0      110  206   0       0     108     1     0.0     1  1
## 111   44   Male  0      110  197   0       0     177     0     0.0     2  1
## 112   53   Male  0      142  226   0       0     111     1     0.0     2  0
## 113   48   Male  0      130  256   1       0     150     1     0.0     2  2
## 114   57   Male  0      110  335   0       1     143     1     3.0     1  1
## 115   59   Male  2      126  218   1       1     134     0     2.2     1  1
## 116   61 Female  0      145  307   0       0     146     1     1.0     1  0
## 117   63   Male  0      130  254   0       0     147     0     1.4     1  1
## 118   43   Male  0      120  177   0       0     120     1     2.5     1  0
## 119   29   Male  1      130  204   0       0     202     0     0.0     2  0
## 120   42   Male  1      120  295   0       1     162     0     0.0     2  0
## 121   54   Male  1      108  309   0       1     156     0     0.0     2  0
## 122   44   Male  0      120  169   0       1     144     1     2.8     0  0
## 123   60   Male  0      145  282   0       0     142     1     2.8     1  2
## 124   65 Female  2      140  417   1       0     157     0     0.8     2  1
## 125   61   Male  0      120  260   0       1     140     1     3.6     1  1
## 126   60 Female  3      150  240   0       1     171     0     0.9     2  0
## 127   66   Male  0      120  302   0       0     151     0     0.4     1  0
## 128   53   Male  2      130  197   1       0     152     0     1.2     0  0
## 129   52   Male  2      138  223   0       1     169     0     0.0     2  4
## 130   57   Male  0      140  192   0       1     148     0     0.4     1  0
## 131   60 Female  3      150  240   0       1     171     0     0.9     2  0
## 132   51 Female  2      130  256   0       0     149     0     0.5     2  0
## 133   41   Male  1      135  203   0       1     132     0     0.0     1  0
## 134   50   Male  2      129  196   0       1     163     0     0.0     2  0
## 135   54   Male  1      108  309   0       1     156     0     0.0     2  0
## 136   58 Female  0      170  225   1       0     146     1     2.8     1  2
## 137   55 Female  1      132  342   0       1     166     0     1.2     2  0
## 138   64 Female  0      180  325   0       1     154     1     0.0     2  0
## 139   47   Male  2      138  257   0       0     156     0     0.0     2  0
## 140   41   Male  1      110  235   0       1     153     0     0.0     2  0
## 141   57   Male  0      152  274   0       1      88     1     1.2     1  1
## 142   63 Female  0      124  197   0       1     136     1     0.0     1  0
## 143   61   Male  3      134  234   0       1     145     0     2.6     1  2
## 144   34   Male  3      118  182   0       0     174     0     0.0     2  0
## 145   47   Male  0      112  204   0       1     143     0     0.1     2  0
## 146   40   Male  0      110  167   0       0     114     1     2.0     1  0
## 147   51 Female  2      120  295   0       0     157     0     0.6     2  0
## 148   41   Male  0      110  172   0       0     158     0     0.0     2  0
## 149   52   Male  3      152  298   1       1     178     0     1.2     1  0
## 150   39   Male  2      140  321   0       0     182     0     0.0     2  0
## 151   58   Male  0      114  318   0       2     140     0     4.4     0  3
## 152   54   Male  1      192  283   0       0     195     0     0.0     2  1
## 153   58   Male  0      125  300   0       0     171     0     0.0     2  2
## 154   54   Male  2      120  258   0       0     147     0     0.4     1  0
## 155   63   Male  0      130  330   1       0     132     1     1.8     2  3
## 156   54   Male  1      108  309   0       1     156     0     0.0     2  0
## 157   40   Male  3      140  199   0       1     178     1     1.4     2  0
## 158   54   Male  2      120  258   0       0     147     0     0.4     1  0
## 159   67 Female  2      115  564   0       0     160     0     1.6     1  0
## 160   41   Male  1      120  157   0       1     182     0     0.0     2  0
## 161   77   Male  0      125  304   0       0     162     1     0.0     2  3
## 162   51   Male  2      100  222   0       1     143     1     1.2     1  0
## 163   77   Male  0      125  304   0       0     162     1     0.0     2  3
## 164   48   Male  0      124  274   0       0     166     0     0.5     1  0
## 165   56   Male  0      125  249   1       0     144     1     1.2     1  1
## 166   59   Male  0      170  326   0       0     140     1     3.4     0  0
## 167   56   Male  0      132  184   0       0     105     1     2.1     1  1
## 168   57 Female  0      120  354   0       1     163     1     0.6     2  0
## 169   43   Male  2      130  315   0       1     162     0     1.9     2  1
## 170   45 Female  1      112  160   0       1     138     0     0.0     1  0
## 171   43   Male  0      150  247   0       1     171     0     1.5     2  0
## 172   56   Male  0      130  283   1       0     103     1     1.6     0  0
## 173   56   Male  1      120  240   0       1     169     0     0.0     0  0
## 174   39 Female  2       94  199   0       1     179     0     0.0     2  0
## 175   54   Male  0      110  239   0       1     126     1     2.8     1  1
## 176   56 Female  0      200  288   1       0     133     1     4.0     0  2
## 177   56   Male  0      130  283   1       0     103     1     1.6     0  0
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## 179   44   Male  0      110  197   0       0     177     0     0.0     2  1
## 180   56 Female  0      134  409   0       0     150     1     1.9     1  2
## 181   63   Male  0      140  187   0       0     144     1     4.0     2  2
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## 183   60   Male  0      140  293   0       0     170     0     1.2     1  2
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## 192   56   Male  1      130  221   0       0     163     0     0.0     2  0
## 193   67 Female  2      115  564   0       0     160     0     1.6     1  0
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## 198   45   Male  0      115  260   0       0     185     0     0.0     2  0
## 199   60 Female  2      102  318   0       1     160     0     0.0     2  1
## 200   50   Male  0      144  200   0       0     126     1     0.9     1  0
## 201   62 Female  0      124  209   0       1     163     0     0.0     2  0
## 202   34   Male  3      118  182   0       0     174     0     0.0     2  0
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## 205   66 Female  2      146  278   0       0     152     0     0.0     1  1
## 206   42   Male  3      148  244   0       0     178     0     0.8     2  2
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## 208   41   Male  2      112  250   0       1     179     0     0.0     2  0
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## 210   62   Male  1      120  281   0       0     103     0     1.4     1  1
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## 218   41   Male  1      120  157   0       1     182     0     0.0     2  0
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## 222   63   Male  0      130  254   0       0     147     0     1.4     1  1
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## 227   49   Male  2      118  149   0       0     126     0     0.8     2  3
## 228   44 Female  2      118  242   0       1     149     0     0.3     1  1
## 229   52   Male  1      128  205   1       1     184     0     0.0     2  0
## 230   66 Female  0      178  228   1       1     165     1     1.0     1  2
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## 234   41 Female  1      126  306   0       1     163     0     0.0     2  0
## 235   49 Female  0      130  269   0       1     163     0     0.0     2  0
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## 240   62 Female  0      150  244   0       1     154     1     1.4     1  0
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## 244   60   Male  2      140  185   0       0     155     0     3.0     1  0
## 245   51   Male  2      125  245   1       0     166     0     2.4     1  0
## 246   44   Male  1      130  219   0       0     188     0     0.0     2  0
## 247   54   Male  1      192  283   0       0     195     0     0.0     2  1
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## 249   39 Female  2      138  220   0       1     152     0     0.0     1  0
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## 792   54   Male  0      110  239   0       1     126     1     2.8     1  1
## 793   68   Male  0      144  193   1       1     141     0     3.4     1  2
## 794   60 Female  2      120  178   1       1      96     0     0.0     2  0
## 795   61   Male  3      134  234   0       1     145     0     2.6     1  2
## 796   62   Male  1      128  208   1       0     140     0     0.0     2  0
## 797   41   Male  1      135  203   0       1     132     0     0.0     1  0
## 798   65 Female  0      150  225   0       0     114     0     1.0     1  3
## 799   59   Male  3      170  288   0       0     159     0     0.2     1  0
## 800   43   Male  0      115  303   0       1     181     0     1.2     1  0
## 801   67   Male  0      120  229   0       0     129     1     2.6     1  2
## 802   63   Male  3      145  233   1       0     150     0     2.3     0  0
## 803   63 Female  0      124  197   0       1     136     1     0.0     1  0
## 804   52   Male  0      112  230   0       1     160     0     0.0     2  1
## 805   58 Female  0      130  197   0       1     131     0     0.6     1  0
## 806   53   Male  0      142  226   0       0     111     1     0.0     2  0
## 807   57   Male  0      150  276   0       0     112     1     0.6     1  1
## 808   44   Male  2      130  233   0       1     179     1     0.4     2  0
## 809   51   Male  2       94  227   0       1     154     1     0.0     2  1
## 810   54 Female  2      110  214   0       1     158     0     1.6     1  0
## 811   40   Male  0      110  167   0       0     114     1     2.0     1  0
## 812   57   Male  1      124  261   0       1     141     0     0.3     2  0
## 813   62 Female  0      140  268   0       0     160     0     3.6     0  2
## 814   53   Male  0      140  203   1       0     155     1     3.1     0  0
## 815   62   Male  1      128  208   1       0     140     0     0.0     2  0
## 816   58   Male  2      105  240   0       0     154     1     0.6     1  0
## 817   70   Male  1      156  245   0       0     143     0     0.0     2  0
## 818   45   Male  0      115  260   0       0     185     0     0.0     2  0
## 819   42   Male  3      148  244   0       0     178     0     0.8     2  2
## 820   58 Female  0      170  225   1       0     146     1     2.8     1  2
## 821   61   Male  0      140  207   0       0     138     1     1.9     2  1
## 822   62 Female  0      140  268   0       0     160     0     3.6     0  2
## 823   60   Male  0      130  253   0       1     144     1     1.4     2  1
## 824   54   Male  0      140  239   0       1     160     0     1.2     2  0
## 825   61   Male  0      138  166   0       0     125     1     3.6     1  1
## 826   63 Female  2      135  252   0       0     172     0     0.0     2  0
## 827   42   Male  2      130  180   0       1     150     0     0.0     2  0
## 828   57   Male  2      128  229   0       0     150     0     0.4     1  1
## 829   44   Male  2      130  233   0       1     179     1     0.4     2  0
## 830   54   Male  0      124  266   0       0     109     1     2.2     1  1
## 831   51   Male  2      100  222   0       1     143     1     1.2     1  0
## 832   58   Male  1      125  220   0       1     144     0     0.4     1  4
## 833   68   Male  2      118  277   0       1     151     0     1.0     2  1
## 834   55   Male  0      140  217   0       1     111     1     5.6     0  0
## 835   42   Male  0      136  315   0       1     125     1     1.8     1  0
## 836   49   Male  2      118  149   0       0     126     0     0.8     2  3
## 837   53 Female  0      138  234   0       0     160     0     0.0     2  0
## 838   52   Male  2      172  199   1       1     162     0     0.5     2  0
## 839   51   Male  3      125  213   0       0     125     1     1.4     2  1
## 840   51   Male  0      140  261   0       0     186     1     0.0     2  0
## 841   70   Male  0      145  174   0       1     125     1     2.6     0  0
## 842   35 Female  0      138  183   0       1     182     0     1.4     2  0
## 843   58   Male  2      112  230   0       0     165     0     2.5     1  1
## 844   59   Male  3      160  273   0       0     125     0     0.0     2  0
## 845   60   Male  0      140  293   0       0     170     0     1.2     1  2
## 846   56   Male  0      132  184   0       0     105     1     2.1     1  1
## 847   35 Female  0      138  183   0       1     182     0     1.4     2  0
## 848   61   Male  0      138  166   0       0     125     1     3.6     1  1
## 849   58 Female  3      150  283   1       0     162     0     1.0     2  0
## 850   52   Male  0      128  255   0       1     161     1     0.0     2  1
## 851   58   Male  1      120  284   0       0     160     0     1.8     1  0
## 852   37   Male  2      130  250   0       1     187     0     3.5     0  0
## 853   52   Male  0      128  255   0       1     161     1     0.0     2  1
## 854   67   Male  0      120  229   0       0     129     1     2.6     1  2
## 855   65   Male  3      138  282   1       0     174     0     1.4     1  1
## 856   46   Male  1      101  197   1       1     156     0     0.0     2  0
## 857   68 Female  2      120  211   0       0     115     0     1.5     1  0
## 858   43   Male  0      115  303   0       1     181     0     1.2     1  0
## 859   68 Female  2      120  211   0       0     115     0     1.5     1  0
## 860   51   Male  0      140  299   0       1     173     1     1.6     2  0
## 861   52   Male  0      112  230   0       1     160     0     0.0     2  1
## 862   64   Male  2      140  335   0       1     158     0     0.0     2  0
## 863   59   Male  3      170  288   0       0     159     0     0.2     1  0
## 864   52   Male  0      125  212   0       1     168     0     1.0     2  2
## 865   59   Male  3      160  273   0       0     125     0     0.0     2  0
## 866   60 Female  3      150  240   0       1     171     0     0.9     2  0
## 867   41   Male  2      112  250   0       1     179     0     0.0     2  0
## 868   41   Male  1      110  235   0       1     153     0     0.0     2  0
## 869   56   Male  1      120  240   0       1     169     0     0.0     0  0
## 870   56   Male  1      120  236   0       1     178     0     0.8     2  0
## 871   48 Female  2      130  275   0       1     139     0     0.2     2  0
## 872   39   Male  2      140  321   0       0     182     0     0.0     2  0
## 873   64   Male  3      170  227   0       0     155     0     0.6     1  0
## 874   57   Male  0      140  192   0       1     148     0     0.4     1  0
## 875   59   Male  3      160  273   0       0     125     0     0.0     2  0
## 876   60   Male  0      130  206   0       0     132     1     2.4     1  2
## 877   61   Male  0      140  207   0       0     138     1     1.9     2  1
## 878   43 Female  2      122  213   0       1     165     0     0.2     1  0
## 879   54   Male  0      120  188   0       1     113     0     1.4     1  1
## 880   59   Male  0      138  271   0       0     182     0     0.0     2  0
## 881   57   Male  0      132  207   0       1     168     1     0.0     2  0
## 882   57   Male  1      154  232   0       0     164     0     0.0     2  1
## 883   57   Male  0      130  131   0       1     115     1     1.2     1  1
## 884   48   Male  0      124  274   0       0     166     0     0.5     1  0
## 885   70   Male  0      145  174   0       1     125     1     2.6     0  0
## 886   57   Male  0      165  289   1       0     124     0     1.0     1  3
## 887   61   Male  0      120  260   0       1     140     1     3.6     1  1
## 888   57   Male  0      110  201   0       1     126     1     1.5     1  0
## 889   60 Female  0      150  258   0       0     157     0     2.6     1  2
## 890   63 Female  0      150  407   0       0     154     0     4.0     1  3
## 891   55 Female  0      128  205   0       2     130     1     2.0     1  1
## 892   64 Female  0      180  325   0       1     154     1     0.0     2  0
## 893   54   Male  0      110  239   0       1     126     1     2.8     1  1
## 894   52   Male  0      128  204   1       1     156     1     1.0     1  0
## 895   51   Male  0      140  299   0       1     173     1     1.6     2  0
## 896   62 Female  2      130  263   0       1      97     0     1.2     1  1
## 897   59   Male  3      178  270   0       0     145     0     4.2     0  0
## 898   52   Male  1      134  201   0       1     158     0     0.8     2  1
## 899   42 Female  0      102  265   0       0     122     0     0.6     1  0
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## 901   61   Male  3      134  234   0       1     145     0     2.6     1  2
## 902   42 Female  0      102  265   0       0     122     0     0.6     1  0
## 903   62 Female  0      140  268   0       0     160     0     3.6     0  2
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## 905   55   Male  1      130  262   0       1     155     0     0.0     2  0
## 906   64   Male  0      120  246   0       0      96     1     2.2     0  1
## 907   42   Male  0      140  226   0       1     178     0     0.0     2  0
## 908   50 Female  1      120  244   0       1     162     0     1.1     2  0
## 909   62   Male  0      120  267   0       1      99     1     1.8     1  2
## 910   50   Male  0      144  200   0       0     126     1     0.9     1  0
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## 912   58 Female  1      136  319   1       0     152     0     0.0     2  2
## 913   35   Male  0      120  198   0       1     130     1     1.6     1  0
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## 915   66   Male  0      112  212   0       0     132     1     0.1     2  1
## 916   46   Male  0      120  249   0       0     144     0     0.8     2  0
## 917   65   Male  0      135  254   0       0     127     0     2.8     1  1
## 918   47   Male  2      130  253   0       1     179     0     0.0     2  0
## 919   59   Male  3      134  204   0       1     162     0     0.8     2  2
## 920   38   Male  3      120  231   0       1     182     1     3.8     1  0
## 921   39   Male  0      118  219   0       1     140     0     1.2     1  0
## 922   58   Male  0      146  218   0       1     105     0     2.0     1  1
## 923   44   Male  1      120  263   0       1     173     0     0.0     2  0
## 924   54   Male  0      140  239   0       1     160     0     1.2     2  0
## 925   61 Female  0      130  330   0       0     169     0     0.0     2  0
## 926   57   Male  0      130  131   0       1     115     1     1.2     1  1
## 927   54   Male  0      110  206   0       0     108     1     0.0     1  1
## 928   42   Male  2      120  240   1       1     194     0     0.8     0  0
## 929   54   Male  0      124  266   0       0     109     1     2.2     1  1
## 930   60   Male  0      130  206   0       0     132     1     2.4     1  2
## 931   65   Male  0      135  254   0       0     127     0     2.8     1  1
## 932   40   Male  0      152  223   0       1     181     0     0.0     2  0
## 933   51 Female  2      140  308   0       0     142     0     1.5     2  1
## 934   38   Male  3      120  231   0       1     182     1     3.8     1  0
## 935   42   Male  2      130  180   0       1     150     0     0.0     2  0
## 936   56   Male  1      120  240   0       1     169     0     0.0     0  0
## 937   43   Male  2      130  315   0       1     162     0     1.9     2  1
## 938   64   Male  2      140  335   0       1     158     0     0.0     2  0
## 939   53   Male  0      142  226   0       0     111     1     0.0     2  0
## 940   49 Female  1      134  271   0       1     162     0     0.0     1  0
## 941   57 Female  0      140  241   0       1     123     1     0.2     1  0
## 942   52 Female  2      136  196   0       0     169     0     0.1     1  0
## 943   69 Female  3      140  239   0       1     151     0     1.8     2  2
## 944   65   Male  0      120  177   0       1     140     0     0.4     2  0
## 945   66 Female  0      178  228   1       1     165     1     1.0     1  2
## 946   56   Male  3      120  193   0       0     162     0     1.9     1  0
## 947   67 Female  2      152  277   0       1     172     0     0.0     2  1
## 948   54 Female  2      160  201   0       1     163     0     0.0     2  1
## 949   70   Male  0      145  174   0       1     125     1     2.6     0  0
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## 951   67   Male  0      160  286   0       0     108     1     1.5     1  3
## 952   62 Female  2      130  263   0       1      97     0     1.2     1  1
## 953   54 Female  2      135  304   1       1     170     0     0.0     2  0
## 954   45 Female  0      138  236   0       0     152     1     0.2     1  0
## 955   53 Female  0      130  264   0       0     143     0     0.4     1  0
## 956   62   Male  2      130  231   0       1     146     0     1.8     1  3
## 957   49 Female  0      130  269   0       1     163     0     0.0     2  0
## 958   50   Male  2      140  233   0       1     163     0     0.6     1  1
## 959   65 Female  2      140  417   1       0     157     0     0.8     2  1
## 960   69 Female  3      140  239   0       1     151     0     1.8     2  2
## 961   52 Female  2      136  196   0       0     169     0     0.1     1  0
## 962   58 Female  0      100  248   0       0     122     0     1.0     1  0
## 963   52   Male  0      108  233   1       1     147     0     0.1     2  3
## 964   57 Female  0      140  241   0       1     123     1     0.2     1  0
## 965   44 Female  2      108  141   0       1     175     0     0.6     1  0
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## 972   52   Male  2      172  199   1       1     162     0     0.5     2  0
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## 1005  51 Female  2      140  308   0       0     142     0     1.5     2  1
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##      thal target
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Now, let’s use statistical tests to see which predictors are related to heart disease. We can explore the associations for each variable in the dataset. Depending on the type of the data (i.e., continuous or categorical), we use t-test or chi-squared test to calculate the p-values.

Recall, t-test is used to determine whether there is a significant difference between the means of two groups (e.g., is the mean age from group A different from the mean age from group B?). A chi-squared test for independence compares the equivalence of two proportions.

# Does sex have an effect? Sex is a binary variable in this dataset, so the appropriate test is chi-squared test
Heart_sex <- chisq.test(Heart$sex, Heart$target)

# Does age have an effect? Age is continuous, so we use t-test here
Heart_age <- t.test(Heart$age ~ Heart$target)

# What about thalach: maximum heart rate one can achieve during exercise?
Heart_rate <- t.test(Heart$thalach ~ Heart$target)

# Print the results to see if p<0.05.
print(Heart_sex)
## 
##  Pearson's Chi-squared test with Yates' continuity correction
## 
## data:  Heart$sex and Heart$target
## X-squared = 78.863, df = 1, p-value < 2.2e-16
print(Heart_age)
## 
##  Welch Two Sample t-test
## 
## data:  Heart$age by Heart$target
## t = 7.5744, df = 1002.5, p-value = 8.18e-14
## alternative hypothesis: true difference in means between group 0 and group 1 is not equal to 0
## 95 percent confidence interval:
##  3.082537 5.238249
## sample estimates:
## mean in group 0 mean in group 1 
##        56.56914        52.40875
print(Heart_rate)
## 
##  Welch Two Sample t-test
## 
## data:  Heart$thalach by Heart$target
## t = -14.862, df = 976.86, p-value < 2.2e-16
## alternative hypothesis: true difference in means between group 0 and group 1 is not equal to 0
## 95 percent confidence interval:
##  -22.02427 -16.88631
## sample estimates:
## mean in group 0 mean in group 1 
##        139.1303        158.5856

All p-value figures are smaller 0.05. In addition to p-values from statistical tests, we can plot the age, sex, and maximum heart rate distributions with respect to our outcome variable. This will give us a sense of both the direction and magnitude of the relationship. First, let’s plot age using a boxplot since it is a continuous variable.

# Recode target to be labelled
Heart %>% mutate(Heart_labelled = ifelse(target == 0, "No disease", "Disease")) -> Heart

# age vs hd
ggplot(data = Heart, aes(x = Heart_labelled, y = age)) + geom_boxplot()

Second, let’s plot sex using a barplot since it is a binary variable in this dataset.

# Define a custom color palette
my_colors <- c("Male" = "black", "Female" = "pink")

# Create the ggplot chart
ggplot(data = Heart, aes(x = Heart_labelled, fill = sex)) +
  geom_bar(position = "fill") +
  ylab("Sex %") +
  scale_fill_manual(values = my_colors)  # Apply the custom colors

# max heart rate vs hd
ggplot(data = Heart, aes(x = Heart_labelled, y = thalach)) + geom_boxplot()

The plots and the statistical tests both confirmed that all the three variables are highly significantly associated with our outcome (p<0.05 for all tests).

In general, we want to use multiple logistic regression when we have one binary outcome variable and two or more predicting variables. The binary variable is the dependent (Y) variable; we are studying the effect that the independent (X) variables have on the probability of obtaining a particular value of the dependent variable. For example, we might want to know the effect that maximum heart rate, age, and sex have on the probability that a person will have a heart disease in the next year. The model will also tell us what the remaining effect of maximum heart rate is after we control or adjust for the effects of the other two factors.

The glm() command is designed to perform generalized linear models (regressions) on binary outcome data, count data, probability data, proportion data, and many other data types. In our case, the outcome is binary following a binomial distribution.

# use glm function from base R and specify the family argument as binomial
model <- glm(data = Heart, target ~ age + sex + thalach, family = "binomial" )

# extract the model summary
summary(model)
## 
## Call:
## glm(formula = target ~ age + sex + thalach, family = "binomial", 
##     data = Heart)
## 
## Coefficients:
##              Estimate Std. Error z value Pr(>|z|)    
## (Intercept) -3.219704   0.874955  -3.680 0.000233 ***
## age         -0.033990   0.008937  -3.803 0.000143 ***
## sexMale     -1.534856   0.168946  -9.085  < 2e-16 ***
## thalach      0.041536   0.003882  10.699  < 2e-16 ***
## ---
## Signif. codes:  0 '***' 0.001 '**' 0.01 '*' 0.05 '.' 0.1 ' ' 1
## 
## (Dispersion parameter for binomial family taken to be 1)
## 
##     Null deviance: 1420.2  on 1024  degrees of freedom
## Residual deviance: 1120.8  on 1021  degrees of freedom
## AIC: 1128.8
## 
## Number of Fisher Scoring iterations: 4

We use Odds Ratio (OR) to quantify how strongly the presence or absence of property A is associated with the presence or absence of the outcome. When the OR is greater than 1, we say A is positively associated with outcome B (increases the Odds of having B). Otherwise, we say A is negatively associated with B (decreases the Odds of having B).

The raw glm coefficient table (the ‘estimate’ column in the printed output) in R represents the log(Odds Ratios) of the outcome. Therefore, we need to convert the values to the original OR scale and calculate the corresponding 95% Confidence Interval (CI) of the estimated Odds Ratios when reporting results from a logistic regression.

# load the broom package
library(broom)

# tidy up the coefficient table
tidy_m <- tidy(model)
tidy_m
## # A tibble: 4 × 5
##   term        estimate std.error statistic  p.value
##   <chr>          <dbl>     <dbl>     <dbl>    <dbl>
## 1 (Intercept)  -3.22     0.875       -3.68 2.33e- 4
## 2 age          -0.0340   0.00894     -3.80 1.43e- 4
## 3 sexMale      -1.53     0.169       -9.08 1.04e-19
## 4 thalach       0.0415   0.00388     10.7  1.03e-26
# calculate OR
tidy_m$OR <- exp(tidy_m$estimate)

# calculate 95% CI and save as lower CI and upper CI
tidy_m$lower_CI <- exp(tidy_m$estimate - 1.96 * tidy_m$std.error)
tidy_m$upper_CI <- exp(tidy_m$estimate + 1.96 * tidy_m$std.error)

# display the updated coefficient table
tidy_m
## # A tibble: 4 × 8
##   term        estimate std.error statistic  p.value     OR lower_CI upper_CI
##   <chr>          <dbl>     <dbl>     <dbl>    <dbl>  <dbl>    <dbl>    <dbl>
## 1 (Intercept)  -3.22     0.875       -3.68 2.33e- 4 0.0400  0.00719    0.222
## 2 age          -0.0340   0.00894     -3.80 1.43e- 4 0.967   0.950      0.984
## 3 sexMale      -1.53     0.169       -9.08 1.04e-19 0.215   0.155      0.300
## 4 thalach       0.0415   0.00388     10.7  1.03e-26 1.04    1.03       1.05

Next, we’d like to translate the predicted probability into a decision rule for clinical use by defining a cutoff value on the probability scale. In practice, when an individual comes in for a health check-up, the doctor would like to know the predicted probability of heart disease, for specific values of the predictors: a 45-year-old female with a max heart rate of 150. To do that, we create a data frame called input_Heart, in which we include the desired values for our prediction.

# get the predicted probability in our dataset using the predict() function
# We include the argument type=”response” in order to get our prediction.
pred_prob <- predict(model, Heart, type="response")

# create a decision rule using probability 0.5 as cutoff and save the predicted decision into the main data frame
Heart$pred_hd <- ifelse(pred_prob >= 0.5, 1, 0)

# create a newdata data frame to save a new case information
input_Heart <- data.frame(age=45, sex="Female", thalach=150)

# predict probability for this new case and print out the predicted value
p_new <- predict(model, input_Heart, type="response")
p_new
##         1 
## 0.8147525

We are going to use some common metrics to evaluate the model performance. The most straightforward one is Accuracy, which is the proportion of the total number of predictions that were correct. On the other hand, we can calculate the classification error rate using 1- accuracy. However, accuracy can be misleading when the response is rare (i.e., imbalanced response). Another popular metric, Area Under the ROC curve (AUC), has the advantage that it’s independent of the change in the proportion of responders. AUC ranges from 0 to 1. The closer it gets to 1 the better the model performance. Lastly, a confusion matrix is an N X N matrix, where N is the level of outcome. For the problem at hand, we have N=2, and hence we get a 2 X 2 matrix. It cross-tabulates the predicted outcome levels against the true outcome levels.

After these metrics are calculated, we’ll see (from the logistic regression OR table) that older age, being male and having a lower max heart rate are all risk factors for heart disease. We can also apply our model to predict the probability of having heart disease. For a 45 years old female who has a max heart rate of 150, our model generated a heart disease probability of 0.177 indicating low risk of heart disease. Although our model has an overall accuracy of 0.71, there are cases that were misclassified as shown in the confusion matrix.

# load Metrics package
library(Metrics)

# calculate auc, accuracy, clasification error
auc <- auc(Heart$target, Heart$pred_hd) 
accuracy <- accuracy(Heart$target, Heart$pred_hd)
classification_error <- ce(Heart$target, Heart$pred_hd) 

# print out the metrics on to screen
print(paste("AUC=", auc))
## [1] "AUC= 0.725740454292616"
print(paste("Accuracy=", accuracy))
## [1] "Accuracy= 0.725853658536585"
print(paste("Classification Error=", classification_error))
## [1] "Classification Error= 0.274146341463415"
# confusion matrix
table(Heart$pred_hd, Heart$pred_hd, dnn=c("True Status", "Predicted Status")) # confusion matrix
##            Predicted Status
## True Status   0   1
##           0 502   0
##           1   0 523