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| Outcome or subgroup title | No. of studies | No. of participants | Statistical method | Effect size |
|---|---|---|---|---|
| 1 Retention rates, Cohort 1 | 1 | Mean Difference (Random, 95% CI) | Totals not selected | |
| 1.1 12 months follow‐up | 1 | Mean Difference (Random, 95% CI) | 0.0 [0.0, 0.0] | |
| 1.2 24 months follow‐up | 1 | Mean Difference (Random, 95% CI) | 0.0 [0.0, 0.0] | |
| 1.3 36 months follow‐up | 1 | Mean Difference (Random, 95% CI) | 0.0 [0.0, 0.0] |
