Table 3 Appraisal of risk of bias, according to Cochrane Effective Practice and Organization of Care risk-of-bias tool [16]
Criterion | Hesketh [18] | Gralla [19] | Kim [20] |
|---|---|---|---|
Random sequence generation | High | Unclear | Unclear |
Allocation concealment | High | Low | High |
Similar baseline outcome measures | Unclear | Low | Low |
Similar baseline characteristics | Low | Low | Low |
Incomplete outcome data | Low | Low | Low |
Blinding | High | Low | High |
Contamination | Unclear | Unclear | Unclear |
Selective outcome reporting | Unclear | Unclear | Unclear |
Other bias | High | Low | Low |