Table 3.
One-year follow-up prevalence of ST use, ST initiation, and ST cessation in prior 30 days by randomization group and baseline smoking status (complete and imputed data)
| Intervention |
No intervention |
|||||
| n (%) | n (%) | OR | 95% CI | GEEa, p value | MI GEEa, p value | |
| Baseline nonsmokers | 42 (3) | 71 (5) | 0.62 | 0.36-1.09 | .095 | .200 |
| Initiation (baseline non-ST users) | 21 (2) | 37 (3) | 0.63 | 0.36-1.13 | .121 | .103 |
| Cessation (baseline ST users) | 34 (62) | 19 (36) | 0.36 | 0.28-0.48 | <.001 | .003 |
| Baseline smokers | 42 (20) | 46 (17) | 1.24 | 0.73-2.12 | .429 | .270 |
| Initiation (baseline non-ST users) | 13 (9) | 14 (7) | 0.88 | 0.51-1.51 | .638 | .774 |
| Cessation (baseline ST users) | 30 (51) | 40 (56) | 1.14 | 0.52-2.53 | .740 | .605 |
Note. Baseline Smoking × Group interaction, GEE, p = .019; MI GEE, p = .032. GEE = generalized estimating equation; MI = multiple imputation; OR = odds ratio; ST = smokeless tobacco.
a
GEE is a model adjusting for clustering within schools; MI with 20 imputations.