Summary of risk of bias assessment
| Type of bias | Low risk | Unclear risk | High risk |
| Selection (random sequence generation) | 9/14 | 2/14 | 3/14 |
| Performance | 6/14 | 3/14 | 5/14 |
| Detection | 8/14 | 2/14 | 4/14 |
| Attrition | 7/14 | 2/14 | 5/14 |
| Reporting | 6/14 | 8/14 | 0/14 |
| Other bias | 12/14 | 0/14 | 2/14 |