Student characteristic | Adjusted cumulative OR | 95% CI | p Value |
Number of CPI's owned | |||
0 | Reference | ||
1 | 1.7 | 1.1 to 2.6 | 0.03 |
2 | 2.5 | 1.2 to 5.1 | 0.01 |
⩾ 3 | 4.8 | 1.9 to 12.2 | 0.001 |
Friend and family smoking | |||
None | Reference | ||
Family only | 1.4 | 0.7 to 2.8 | 0.35 |
Friends only | 3.3 | 1.9 to 5.8 | < 0.0001 |
Family and friends | 5.5 | 3.1 to 9.8 | < 0.0001 |
↵4-150 This model also includes controls for grade in school, sex, school performance, and perceived prevalence of smoking.