Table 1.
Weighted means (95% CI) for prolonged abstinence and point prevalence
| Outcome | Adjusteda |
|
| Prolonged abstinence | Point prevalence abstinence | |
| Percent abstinent | ||
| All (n = 76) | 18 (15, 20) | 24 (21, 27) |
| Active (n = 42) | 21 (18, 23) | 28 (25, 31) |
| Control (n = 34) | 12 (10, 14) | 17 (15, 20) |
| Effect size | ||
| Relative risk (n = 42)b | 1.7 (1.5, 2.0) | 1.6 (1.5, 1.8) |
| Odds ratio (n = 42)b | 1.9 (1.7, 2.2) | 1.9 (1.6, 2.2) |
| Difference (n = 42)c | 8 (6, 10) | 10 (8, 13) |
Note. aAdjusted for nonindependence due to the 28 studies contributing several comparisons.
b
Referent = control.
c
Difference in percent abstinent in active minus control condition.