Table 2.
Comparison of intervention and control group outcomes by measure and time period, a n=503
| Follow-up survey | Measure | Intervention (SE) (n=262) | Control (SE) (n=241) | Relative risk (95% CI) | |
|---|---|---|---|---|---|
| Primary outcome | Biochemically confirmed repeated point prevalence abstinence | 11.1% (0.02) | 5.0% (0.01) | 2.22 (1.16, 4.26)* | |
| Self–reported repeated point prevalence abstinenceb | 19.9% (0.02) | 10.0% (0.02) | 1.99 (1.27, 3.13)** | ||
| Biochemically confirmed abstinence | 15.7% (0.02) | 11.2% (0.02) | 1.40 (0.89, 2.20) | ||
| Secondary outcomes | 6 months | Not smoked in the past 7 days (%) | 31.7% (0.03) | 20.8% (0.03) | 1.53(1.13, 2.07)** |
| Not smoked in the past 30 days (%) | 24.8% (0.03) | 15.8% (0.02) | 1.57 (1.10, 2.26)* | ||
| 3 months | Not smoked in the past 7 days (%) | 33.2% (0.03) | 19.9% (0.03) | 1.67 (1.23, 2.26)** | |
| Not smoked in the past 30 days (%) | 27.5% (0.03) | 16.2% (0.02) | 1.70 (1.20, 2.41)** | ||
| 1 month | Not smoked in the past 7 days (%) | 30.5% (0.03) | 14.5% (0.02) | 2.10 (1.47, 3.00)*** | |
| Not smoked in the past 30 days (%) | 11.8% (0.02) | 7.5% (0.02) | 1.58 (0.91, 2.76) |
Note: Boldface indicates statistical significance
a
Chi-square analyses were conducted to examine outcomes across the intervention and control groups. Unadjusted risk ratios are presented. Missing data were imputed to indicate smoking.
b
Self–reported repeated point prevalence abstinence is defined as not smoking in the past 30 days at 3- and 6-month follow-ups.
*
p<0.05,
**
p<0.01,
***
p<0.001.