Smoking incidence at 1-year follow-up among 12th grade students who had never smoked traditional, combustible cigarettes, by baseline vaping (SEs and 95% relative risk CIs in brackets)†
| Model | (1) | (2) |
|---|---|---|
| All | See ‘great risk’ in smoking cigarettes | |
| n (weighted) | 246 | 204 |
| Recently vaped at time of 12th grade survey | ||
| No | 6.75 (1.70) | 7.15 (1.96) |
| Yes | 31.07 (14.00) | 32.92 (14.99) |
| Bivariate relative risk‡ | 4.60** (1.71 to 12.34) | 4.59** (1.67 to 12.63) |
| Adjusted relative risk‡ | 4.78** (1.91 to 11.96) | 4.64** (1.66 to 12.93) |
**p<0.01.
†Estimates weighted.
‡Differences across e-cigarette use groups modelled in a binomial regression with a log link. See online supplementary table A4 for detailed presentation of the controls in the models for adjusted relative risk.