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Summary table for risk-of-bias for MRCTs and single-country trials.
| Study type | High | Low | Low-to-moderate | Moderate | Moderate-to-high | Unclear | Grand total |
| MRCT | 9 (9%) | 27 (27%) | 26 (26%) | 17 (17%) | 18 (18%) | 2 (2%) | 99 |
| Single-country | 2 (7%) | 3 (10%) | 14 (47%) | 6 (20%) | 4 (13%) | 1 (3%) | 30 |
