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Summary risk of bias assessment
| Score—proportion (number of estimates) |
|||
|---|---|---|---|
| Risk of bias indicator | High risk % (k) | Low risk % (k) | Unclear risk % (k) |
| Allocation concealment | 2 (1) | 72 (36) | 26 (13) |
| Blinding of participants and providers | 12 (6) | 30 (15) | 58 (29) |
| Blinding of outcome assessment | 10 (5) | 42 (21) | 48 (24) |
| Intention-to-treat analysis | 6 (3) | 48 (24) | 46 (23) |
| Loss to follow-up | 20 (10) | 80 (40) | 0 (0) |
