TABLE 1.
Comparison of Baseline Characteristics Among Those Who Completed All 3 Surveys Versus Those Who Were Lost to Follow-up After Wave 2
| Characteristic | Completed All 3 Surveys (n = 1791; 68.8%) |
Lost to Follow-up After Wave 2 (n = 812; 31.2%) |
P | OR (95% CI) for Being Lost to Follow-up |
||
|---|---|---|---|---|---|---|
| n | Col% | n | Col% | |||
| Movie smoking exposure | <.0001 | |||||
| First quartile | 502 | 28.0 | 149 | 18.4 | 1.00 | |
| Second quartile | 472 | 26.3 | 179 | 22.0 | 1.28 (0.99–1.64) | |
| Third quartile | 431 | 24.1 | 220 | 27.1 | 1.72 (1.35–2.20) | |
| Fourth quartile | 386 | 21.6 | 264 | 32.5 | 2.30 (1.81–2.93) | |
| Sociodemographics | ||||||
| Age, y | .0037 | |||||
| 10–11 | 593 | 33.1 | 231 | 28.5 | 1.00 | |
| 12 | 561 | 31.3 | 238 | 29.3 | 1.09 (0.88–1.35) | |
| 13–14 | 637 | 35.6 | 343 | 42.2 | 1.38 (1.13–1.69) | |
| Gender | .0174 | |||||
| Male | 821 | 45.8 | 413 | 50.9 | 1.00 | |
| Female | 970 | 54.2 | 399 | 49.1 | 0.82 (0.69–0.97) | |
| Social influences | ||||||
| Either parent smokes | <.0001 | |||||
| No | 1335 | 74.5 | 495 | 61.0 | 1.00 | |
| Yes | 456 | 25.5 | 317 | 39.0 | 1.88 (1.57–2.24) | |
| Any friends smoke | <.0001 | |||||
| No | 1393 | 77.8 | 539 | 66.4 | 1.00 | |
| Yes | 398 | 22.2 | 273 | 33.6 | 1.77 (1.48–2.13) | |
| Any siblings smoke | <.0001 | |||||
| No | 1639 | 91.5 | 697 | 85.8 | 1.00 | |
| Yes | 152 | 8.5 | 115 | 14.2 | 1.78 (1.38–2.30) | |
| Receptive to tobacco promotions | <.0001 | |||||
| No | 1534 | 85.6 | 627 | 77.2 | 1.00 | |
| Yes | 257 | 14.4 | 185 | 23.8 | 1.76 (1.43–2.17) | |
| Child characteristics | ||||||
| School performance | <.0001 | |||||
| Excellent | 831 | 46.4 | 282 | 34.7 | 1.00 | |
| Good | 677 | 37.8 | 329 | 40.5 | 1.43 (1.19–1.73) | |
| Average/below average | 283 | 15.8 | 201 | 24.8 | 2.09 (1.67–2.62) | |
| Sensation seeking | <.0001 | |||||
| First quartile | 593 | 33.1 | 199 | 24.5 | 1.00 | |
| Second quartile | 492 | 27.5 | 217 | 26.7 | 1.31 (1.05–1.65) | |
| Third quartile | 312 | 17.4 | 172 | 21.2 | 1.64 (1.29–2.10) | |
| Fourth quartile | 394 | 22.0 | 224 | 27.6 | 1.69 (1.35–2.13) | |
| Rebelliousness | <.0001 | |||||
| First quartile | 564 | 31.5 | 207 | 25.5 | 1.00 | |
| Second quartile | 402 | 22.4 | 147 | 18.1 | 1.00 (0.78–1.28) | |
| Third quartile | 449 | 25.1 | 219 | 27.0 | 1.33 (1.06–1.67) | |
| Fourth quartile | 376 | 21.0 | 239 | 29.4 | 1.73 (1.38–2.17) | |
| Self-esteem | .1714 | |||||
| First quartile | 456 | 25.5 | 220 | 27.1 | 1.00 | |
| Second quartile | 506 | 28.2 | 241 | 29.7 | 0.99 (0.79–1.23) | |
| Third quartile | 521 | 29.1 | 239 | 29.4 | 0.95 (0.76–1.19) | |
| Fourth quartile | 308 | 17.2 | 112 | 13.8 | 0.75 (0.58–0.99) | |
| Parent characteristics | ||||||
| Maternal demandingness | .2419 | |||||
| First quartile | 410 | 22.9 | 207 | 25.5 | 1.00 | |
| Second quartile | 454 | 25.4 | 212 | 26.1 | 0.93 (0.73–1.17) | |
| Third quartile | 521 | 29.1 | 234 | 28.8 | 0.89 (0.71–1.12) | |
| Fourth quartile | 406 | 22.7 | 159 | 19.6 | 0.78 (0.61–0.99) | |
| Maternal responsiveness | .0951 | |||||
| First quartile | 344 | 19.2 | 182 | 22.4 | 1.00 | |
| Second quartile | 384 | 21.4 | 187 | 23.0 | 0.92 (0.72–1.18) | |
| Third quartile | 472 | 26.4 | 207 | 25.5 | 0.83 (0.65–1.06) | |
| Fourth quartile | 591 | 33.0 | 236 | 29.1 | 0.76 (0.60–0.95) | |
| Parent education | .0003 | |||||
| Both completed high school | 1560 | 87.1 | 663 | 81.7 | 1.00 | |
| Neither or one completed high school | 231 | 12.9 | 149 | 18.3 | 1.52 (1.21–1.90) | |
| Parental disapproval of smoking | .5098 | |||||
| Both disapprove | 1490 | 83.2 | 667 | 82.1 | 1.00 | |
| Neither or mixed disapprove | 301 | 16.8 | 145 | 17.9 | 1.08 (0.87–1.34) | |