Table 3.
Adjusted smoking-cessation ratesa of each intervention component and selected interactions. Per-protocol analysis (n=944)
| Factor | Adjusted 6-month cessation ratea(%) | χ2 | p |
|---|---|---|---|
| Success story | 5.58 | 0.018 | |
| High depth (n=488) | 34.3 | ||
| Low depth (n=456) | 26.8 | ||
| Source | 4.26 | 0.039 | |
| High personalization (n=481) | 33.6 | ||
| Low personalization (n=463) | 27.4 | ||
| Efficacy expectations | 1.55 | 0.213 | |
| High depth (n=466) | 32.4 | ||
| Low depth (n=478) | 28.5 | ||
| Outcome expectations | 1.37 | 0.242 | |
| High depth (n=494) | 32.2 | ||
| Low depth (n=450) | 28.7 | ||
| Exposure | 0.33 | 0.567 | |
| Multiple (n=487) | 29.6 | ||
| Single (n=457) | 31.3 | ||
| Success story × education | 4.24 | 0.040 | |
| Low-depth story × ≤HS graduate (n=167) | 24.9 | ||
| Low-depth story × >HS graduate (n=289) | 28.8 | ||
| High-depth story × ≤HS graduate (n=178) | 39.1 | ||
| High-depth story × >HS graduate (n=310) | 29.8 | ||
| Source × efficacy interaction | 3.70 | 0.054 | |
| Low personalized source × low-depth efficacy (n=243) | 23.1 | ||
| Low personalized source × high-depth efficacy (n=220) | 32.2 | ||
| High personalized source × low-depth efficacy (n=235) | 34.7 | ||
| High personalized source × high-depth efficacy (n=246) | 32.6 |
a
Seven-day point-prevalence abstinence. Cessation rates adjusted for baseline characteristics of Table 2. Missing data in these characteristics reduced the sample size from 954 to 944 for these analyses.
HS, high school