Multivariate Breakdown of Covariates and Missingness

Sample Sizes of Education by Site
Site: 3 Site: 4 Site: 5 Site: 6 Site: 7 Site: 8
Eduction: 0 833 1493 875 1239 495 1831
Education: 1 914 1013 921 1078 834 948
Eduction: 2 1226 1052 1230 780 2202 908
Sample Sizes of Race by Site
Site: 3 Site: 4 Site: 5 Site: 6 Site: 7 Site: 8
Race: Black 1573 796 1537 1773 1682 467
Race: Chinese 0 8 0 0 974 1384
Race: Hispanic 1393 1187 1489 0 875 428
Race: White 7 1567 0 1324 0 1408
Sample Sizes of Gender by Site
Site: 3 Site: 4 Site: 5 Site: 6 Site: 7 Site: 8
Gender: 0 1593 1995 1598 1566 1839 1849
Gender: 1 1380 1563 1428 1531 1692 1838
Sample Sizes of Site by CT Exam
Site: 3 Site: 4 Site: 5 Site: 6 Site: 7 Site: 8
CT Exam: 1 1077 1102 1086 1066 1164 1318
CT Exam: 2 473 497 450 448 507 572
CT Exam: 3 491 462 444 502 506 519
CT Exam: 4 215 336 222 278 257 354
CT Exam: 5 549 677 426 408 619 518
CT Exam: 6 168 484 398 395 478 406
Sample Sizes of Gender by CT Exam
Gender: 0 Gender: 1
CT Exam: 1 3600 3213
CT Exam: 2 1557 1390
CT Exam: 3 1525 1399
CT Exam: 4 869 793
CT Exam: 5 1669 1528
CT Exam: 6 1220 1109
Sample Sizes of Education by CT Exam
Eduction: 0 Education: 1 Eduction: 2
CT Exam: 1 2483 1937 2393
CT Exam: 2 1031 850 1066
CT Exam: 3 1012 831 1081
CT Exam: 4 572 482 608
CT Exam: 5 1005 923 1269
CT Exam: 6 663 685 981
Sample Sizes of Race by CT Exam
Race: Black Race: Chinese Race: Hispanic Race: White
CT Exam: 1 2622 804 1892 1495
CT Exam: 2 1146 345 795 661
CT Exam: 3 1200 341 787 596
CT Exam: 4 721 144 413 384
CT Exam: 5 1238 417 869 673
CT Exam: 6 901 315 616 497

Model for Dropout CT Exam 2

CT Exam 2 IPW Denominator Regression Model
  dropout
Predictors Odds Ratios CI p
(Intercept) 105.39 47.50 – 235.89 <0.001
Age1c 0.97 0.96 – 0.97 <0.001
new smkst 0 1.02 0.86 – 1.20 0.861
site1c [4] 1.02 0.75 – 1.39 0.897
site1c [5] 0.64 0.48 – 0.84 0.002
site1c [6] 1.10 0.80 – 1.52 0.542
site1c [7] 0.74 0.54 – 1.02 0.062
site1c [8] 0.66 0.50 – 0.87 0.004
Gender1 1.09 0.92 – 1.29 0.345
Bmi16 0.99 0.97 – 1.00 0.120
edu [1] 1.22 1.00 – 1.49 0.050
edu [2] 1.66 1.33 – 2.08 <0.001
nsesindex 0.97 0.96 – 0.99 <0.001
Observations 6771
R2 Tjur 0.029

Model for Dropout CT Exam 3

CT Exam 3 IPW Denominator Regression Model
  dropout
Predictors Odds Ratios CI p
(Intercept) 53.40 25.12 – 114.25 <0.001
Age1c 0.97 0.96 – 0.97 <0.001
new smkst 0 1.11 0.95 – 1.29 0.187
site1c [4] 1.68 1.29 – 2.21 <0.001
site1c [5] 0.92 0.72 – 1.18 0.530
site1c [6] 1.36 1.05 – 1.78 0.021
site1c [7] 1.26 0.97 – 1.64 0.086
site1c [8] 0.77 0.61 – 0.98 0.031
Gender1 1.05 0.90 – 1.22 0.547
Bmi16 0.99 0.98 – 1.00 0.175
edu [1] 0.90 0.74 – 1.10 0.308
edu [0] 0.92 0.75 – 1.13 0.409
nsesindex 1.01 0.99 – 1.02 0.406
income 1.00 1.00 – 1.00 0.106
Observations 6018
R2 Tjur 0.030

Model for Dropout CT Exam 4

CT Exam 4 IPW Denominator Regression Model
  dropout
Predictors Odds Ratios CI p
(Intercept) 204.18 96.55 – 435.99 <0.001
Age1c 0.94 0.93 – 0.95 <0.001
new smkst 0 1.19 1.01 – 1.39 0.035
site1c [4] 1.49 1.14 – 1.95 0.004
site1c [5] 1.08 0.83 – 1.40 0.578
site1c [6] 1.14 0.88 – 1.49 0.330
site1c [7] 1.44 1.09 – 1.90 0.010
site1c [8] 0.82 0.64 – 1.05 0.115
Gender1 1.00 0.85 – 1.17 0.983
Bmi16 1.01 0.99 – 1.02 0.510
edu [1] 0.94 0.77 – 1.15 0.539
edu [0] 0.80 0.66 – 0.98 0.029
nsesindex 0.99 0.98 – 1.01 0.311
Observations 5135
R2 Tjur 0.069

Model for Dropout CT Exam 5

CT Exam 5 IPW Denominator Regression Model
  dropout
Predictors Odds Ratios CI p
(Intercept) 1934.11 610.66 – 6275.41 <0.001
Age1c 0.92 0.91 – 0.94 <0.001
new smkst 0 1.00 0.80 – 1.27 0.969
site1c [4] 1.29 0.87 – 1.91 0.206
site1c [5] 1.07 0.72 – 1.61 0.738
site1c [6] 0.83 0.57 – 1.21 0.343
site1c [7] 1.03 0.69 – 1.53 0.876
site1c [8] 1.08 0.73 – 1.60 0.705
Gender1 0.83 0.66 – 1.05 0.124
Bmi16 1.00 0.98 – 1.02 0.964
edu [1] 0.84 0.62 – 1.14 0.256
edu [0] 0.67 0.50 – 0.90 0.007
nsesindex 0.99 0.97 – 1.01 0.326
Observations 4211
R2 Tjur 0.058

Model for Dropout CT Exam 6

CT Exam 6 IPW Denominator Regression Model
  dropout
Predictors Odds Ratios CI p
(Intercept) 4.31 2.13 – 8.74 <0.001
Age1c 0.95 0.94 – 0.96 <0.001
new smkst 0 1.15 0.99 – 1.34 0.061
site1c [4] 5.70 4.41 – 7.40 <0.001
site1c [5] 8.00 5.98 – 10.75 <0.001
site1c [6] 3.91 3.02 – 5.07 <0.001
site1c [7] 4.60 3.55 – 5.99 <0.001
site1c [8] 4.91 3.76 – 6.44 <0.001
Gender1 1.05 0.90 – 1.22 0.527
Bmi16 1.03 1.01 – 1.04 <0.001
edu [1] 0.85 0.70 – 1.02 0.079
edu [0] 0.69 0.57 – 0.84 <0.001
nsesindex 1.00 0.98 – 1.01 0.518
Observations 3558
R2 Tjur 0.132

Looking at Distribution of IPW Weights

## [1] 0.9950302
## [1] 0.9838981

Testing Distribution of Covariates against Baseline Covariates

Variables Baseline CT Exam 2 CT Exam 3 CT Exam 4 CT Exam 5 CT Exam 6
Site: 3 0.155 (1055) 0.158 (463) 0.168 (489) 0.161 (224) 0.168 (520) 0.157 (342)
Site: 4 0.163 (1112) 0.167 (489) 0.151 (438) 0.169 (236) 0.208 (644) 0.188 (410)
Site: 5 0.157 (1071) 0.156 (458) 0.157 (458) 0.121 (168) 0.108 (334) 0.124 (269)
Site: 6 0.157 (1071) 0.146 (429) 0.166 (482) 0.206 (287) 0.138 (427) 0.176 (384)
Site: 7 0.172 (1170) 0.17 (500) 0.168 (487) 0.183 (255) 0.209 (646) 0.193 (422)
Site: 8 0.196 (1334) 0.203 (596) 0.19 (553) 0.16 (223) 0.169 (524) 0.162 (353)
Age 62.078 (0.125) 62.019 (0.194) 62.406 (0.189) 62.379 (0.289) 60.49 (0.184) 59.507 (0.222)
Race: Black 0.275 (1870) 0.269 (790) 0.269 (783) 0.256 (356) 0.264 (816) 0.275 (600)
Race: Chinese 0.12 (816) 0.121 (354) 0.12 (349) 0.108 (151) 0.134 (414) 0.125 (272)
Race: Hispanic 0.221 (1506) 0.229 (671) 0.204 (593) 0.25 (348) 0.227 (703) 0.209 (455)
Race: White 0.385 (2621) 0.381 (1117) 0.406 (1181) 0.386 (538) 0.376 (1162) 0.392 (854)
New Smoking Status: 0 0.452 (3077) 0.481 (1409) 0.448 (1302) 0.467 (651) 0.457 (1414) 0.446 (972)
New Smoking Status: 1 0.407 (2771) 0.404 (1185) 0.449 (1304) 0.434 (604) 0.446 (1382) 0.5 (1090)
New Smoking Status: 2 0.142 (965) 0.115 (338) 0.103 (301) 0.099 (139) 0.097 (299) 0.054 (118)
Employment Status: No 0.399 (2721) 0.394 (1157) 0.395 (1149) 0.393 (548) 0.336 (1041) 0.705 (1536)
Employment Status: Yes 0.601 (4092) 0.606 (1776) 0.605 (1758) 0.607 (846) 0.664 (2054) 0.295 (644)
Education Status: 0 0.361 (2459) 0.36 (1057) 0.352 (1024) 0.381 (532) 0.331 (1024) 0.317 (691)
Education Status: 1 0.285 (1939) 0.288 (845) 0.286 (831) 0.269 (376) 0.287 (890) 0.288 (629)
Education Status: 2 0.354 (2415) 0.352 (1031) 0.362 (1051) 0.349 (487) 0.382 (1181) 0.395 (861)
Height (cm) 166.362 (0.122) 166.3 (0.187) 166.659 (0.189) 166.53 (0.271) 166.806 (0.189) 167.063 (0.235)
Weight (lb) 173.313 (0.466) 172.717 (0.706) 174.264 (0.706) 172.983 (0.966) 173.832 (0.704) 174.826 (0.865)
BMI 28.351 (0.067) 28.292 (0.103) 28.394 (0.101) 28.256 (0.139) 28.257 (0.098) 28.357 (0.121)
Income 50123.658 (435.592) 50375.238 (656.888) 50941.841 (663.588) 49197.126 (934.414) 53785.195 (676.175) 56934.832 (804.169)
NSES Index -1.051 (0.076) -0.955 (0.114) -1.338 (0.116) -0.89 (0.166) -1.368 (0.123) -1.247 (0.137)
Gender: 0 0.528 (3597) 0.533 (1564) 0.524 (1522) 0.513 (716) 0.519 (1606.842) 0.527 (1149)
Gender: 1 0.472 (3216) 0.467 (1369) 0.476 (1385) 0.487 (678) 0.481 (1488.158) 0.473 (1031)
Variables Baseline CT Exam 2 CT Exam 3 CT Exam 4 CT Exam 5 CT Exam 6
Site: 3 0.155 (1055) 0.161 (472) 0.166 (483) 0.159 (221) 0.168 (520) 0.073 (159)
Site: 4 0.163 (1112) 0.169 (497) 0.159 (462) 0.176 (246) 0.21 (650) 0.213 (465)
Site: 5 0.157 (1071) 0.151 (443) 0.152 (442) 0.12 (167) 0.107 (333) 0.154 (337)
Site: 6 0.157 (1071) 0.15 (440) 0.172 (499) 0.206 (288) 0.136 (422) 0.177 (386)
Site: 7 0.172 (1170) 0.173 (508) 0.173 (502) 0.191 (267) 0.21 (651) 0.211 (459)
Site: 8 0.196 (1334) 0.195 (573) 0.178 (519) 0.148 (206) 0.168 (520) 0.172 (374)
Age 62.078 (0.125) 61.618 (0.192) 61.83 (0.185) 61.229 (0.274) 59.886 (0.176) 57.809 (0.183)
Race: Black 0.275 (1870) 0.268 (786) 0.268 (780) 0.258 (359) 0.264 (817) 0.261 (569)
Race: Chinese 0.12 (816) 0.12 (351) 0.117 (341) 0.106 (148) 0.134 (414) 0.132 (287)
Race: Hispanic 0.221 (1506) 0.225 (660) 0.205 (596) 0.248 (345) 0.226 (701) 0.221 (482)
Race: White 0.385 (2621) 0.387 (1136) 0.409 (1190) 0.389 (542) 0.376 (1163) 0.386 (841)
New Smoking Status: 0 0.452 (3077) 0.48 (1409) 0.45 (1308) 0.478 (667) 0.459 (1420) 0.467 (1019)
New Smoking Status: 1 0.407 (2771) 0.403 (1182) 0.444 (1292) 0.419 (585) 0.443 (1372) 0.476 (1038)
New Smoking Status: 2 0.142 (965) 0.117 (342) 0.106 (308) 0.102 (143) 0.098 (304) 0.056 (123)
Employment Status: No 0.399 (2721) 0.382 (1121) 0.381 (1107) 0.366 (510) 0.322 (998) 0.68 (1483)
Employment Status: Yes 0.601 (4092) 0.618 (1812) 0.619 (1800) 0.634 (884) 0.678 (2097) 0.32 (697)
Education Status: 0 0.361 (2459) 0.346 (1014) 0.344 (1000) 0.364 (507) 0.321 (992) 0.286 (623)
Education Status: 1 0.285 (1939) 0.289 (849) 0.286 (830) 0.272 (379) 0.289 (895) 0.297 (647)
Education Status: 2 0.354 (2415) 0.365 (1070) 0.37 (1077) 0.364 (508) 0.39 (1208) 0.417 (910)
Height (cm) 166.362 (0.122) 166.471 (0.185) 166.8 (0.188) 166.647 (0.27) 166.856 (0.188) 167.083 (0.211)
Weight (lb) 173.313 (0.466) 172.867 (0.703) 174.583 (0.706) 173.561 (0.976) 174.063 (0.708) 176.066 (0.82)
BMI 28.351 (0.067) 28.259 (0.102) 28.399 (0.1) 28.309 (0.141) 28.278 (0.099) 28.564 (0.119)
Income 50123.658 (435.592) 51390.935 (663.181) 52083.002 (671.616) 50714.169 (939.302) 54594.513 (678.571) 58759.49 (760.92)
NSES Index -1.051 (0.076) -1.1 (0.116) -1.384 (0.117) -0.994 (0.169) -1.421 (0.124) -1.419 (0.138)
Gender: 0 0.528 (3597) 0.53 (1554) 0.522 (1517) 0.518 (722) 0.523 (1617) 0.526 (1146)
Gender: 1 0.472 (3216) 0.47 (1379) 0.478 (1390) 0.482 (672) 0.477 (1478) 0.474 (1034) 
## [1] "mesa totals"
## [1] 6813
## [1] 2933
## [1] 2907
## [1] 1394
## [1] 3095
## [1] 2180