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Summary of assessment of risk of bias of RCTs (frequency distributions in %)
| Risk of bias | Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias | Other bias |
|---|---|---|---|---|---|---|
| Low | 73.3 | 86.7 | 33.3 | 53.3 | 86.6 | 60.0 |
| Unclear | 6.7 | 0 | 20.0 | 0 | 6.7 | 40.0 |
| High | 20.0 | 13.3 | 46.6 | 46.7 | 6.7 | 0 |
