Table 7:
Longitudinal Outcomes: Intent to Use E-Cigarettes, Opinion of E-Cigarette Companies
| Question | Expert | Peer-random | Peer-fixed | Peer-fixed vs Expert | Peer-fixed vs Peer-random | |||
|---|---|---|---|---|---|---|---|---|
| Pre | Post | Pre | Post | Pre | Post | Odds Ratio (97.5% CI) a | Odds Ratio (97.5% CI) b | |
| Q1: Try e-cigarette soon (%) | 3 | 3 | 3 | 3 | 9 | 6 | 0.31 (0.03, 3.59) | 0.34 (0.01, 13.09) |
| ITT (Intention-to-Treat) | 2 | 2 | 4 | 5 | 9 | 6 | 0.42 (0.03, 6.30) | 0.25 (0.02, 3.71) |
| PP (Per-Protocol) | 2 | 2 | 3 | 3 | 9 | 6 | 0.47 (0.04, 6.30) | 0.39 (0.01, 12.07) |
| Q2: Try e-cigarette if offered by friend (%) | 3 | 5 | 3 | 3 | 11 | 12 | 0.63 (0.09, 4.42) | 1.22 (0.04, 33.17) |
| ITT | 3 | 3 | 3 | 7 | 11 | 12 | 1.23 (0.14, 10.77) | 0.35 (0.04, 3.48) |
| PP | 3 | 3 | 3 | 3 | 11 | 12 | 1.24 (0.14, 11.07) | 1.23 (0.04, 34.90) |
| Q3: E-cigarette companies target young people (%) | 84 | 93 | 93 | 97 | 74 | 94 | 3.39 (0.65, 17.76) | 3.76 (0.26, 54.12) |
| ITT | 82 | 93 | 92 | 95 | 74 | 94 | 2.80 (0.51, 15.19) | 6.12 (0.83, 45.23) |
| PP | 82 | 93 | 93 | 97 | 74 | 94 | 2.80 (0.51, 15.30) | 3.79 (0.26, 55.20) |
*
<0.05
**
<0.01
a
Compares odds of yes on post vs pre-test, between Peer-fixed and Expert groups (lower values favor Peer-fixed for Q1 & Q2)
b
Compares odds of yes on post vs pre-test, between Peer-fixed and Peer-random groups (lower values favor Peer-fixed for Q1 & Q2)
a,b
97.5% confidence intervals (CIs) are presented to adjust for two pairwise comparisons within each survey question.