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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 All studies: cessation | 5 | Risk Ratio (M‐H, Random, 95% CI) | Totals not selected | |
| 2 All studies: cessation ‐ Naik 2014 removed | 4 | 684 | Risk Ratio (M‐H, Random, 95% CI) | 0.84 [0.63, 1.12] |
