Risk of bias of included studies
| Study | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Other sources of bias | Total risk of bias |
|---|---|---|---|---|---|---|---|---|
| Allen et al11 | Low | Low | High | Low | Low | Low | Low | Low |
| Bloomer et al12 | Low | Unclear | High | Low | Low | Low | Low | Low |
| Bridgewater et al13 | High | Unclear | High | High | Low | Low | Low | High |
| Combs et al14 | Low | Low | High | Low | Low | Low | Low | Low |
| Corcos et al15 | Low | Low | High | Low | Low | Low | Low | Low |
| Cruise et al16 | High | Unclear | High | High | Low | Low | Low | High |
| DiFrancisco-Donoghue et al17 | Low | Unclear | High | High | Low | Low | Low | Low |
| Hass et al18 | Low | Unclear | High | High | Low | Low | Low | Low |
| Hirsch et al19 | High | Unclear | High | High | Low | Low | Low | High |
| Paul et al20 | Low | Unclear | High | Low | Low | Low | Low | Low |
| Schilling et al21 | Low | Unclear | High | High | Low | Low | Low | Low |
| Shulman et al22 | Low | Low | Low | Low | Low | Low | Low | Low |