Comparison 27. B ‐ Monetary incentives: Lottery vs usual follow‐up.
| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 27.1 Retention | 1 | 4206 | Risk Difference (M‐H, Fixed, 95% CI) | ‐0.01 [‐0.03, 0.02] |
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