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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 2.1 Abstinence at longest follow‐up | 1 | 470 | Risk Ratio (M‐H, Fixed, 95% CI) | 1.28 [0.98, 1.67] |
| 2.1.1 84 days vs 40 days | 1 | 470 | Risk Ratio (M‐H, Fixed, 95% CI) | 1.28 [0.98, 1.67] |
