Sensitivity analysis showing how missing data for exposure to tobacco use in movies was handled for assessment of its relation with ever tobacco use
| Exposure to movie tobacco use | Adjusted* OR (95% CI) | ||
| Model I† | Model II‡ | Model III§ | |
| First quartile | Reference | Reference | Reference |
| Second quartile | 1.1 (0.6–2.0) | 1.3 (0.7–2.6) | 1.7 (0.7–4.0) |
| Third quartile | 1.6 (0.9–2.7) | 2.0 (1.1–3.7) | 1.8 (0.8–4.1) |
| Fourth quartile | 2.3 (1.3–3.9) | 2.9 (1.6–5.3) | 3.6 (1.7–7.6) |
↵* Adjusted for demographic profiles, social influences, academic performance, sensation seeking and authoritative parenting.
↵† Final model from table 3, no adjustment for missing data on movie tobacco use (n=3956).
↵‡ Dropping 198 students who failed to answer more than 20 movie questions (n=3758).
↵§ Dropping 1351 students who failed to answer one or more movie questions (n=2605).