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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Prolonged abstinence at longest follow‐up | 2 | Risk Ratio (M‐H, Fixed, 95% CI) | Totals not selected | |
| 2 Point prevalence abstinence at longest follow‐up | 1 | 543 | Risk Ratio (M‐H, Fixed, 95% CI) | 2.50 [1.47, 4.26] |
