Table 5:
Cochrane Risk of Bias Analysis
| Author Year | D1 | D2 | D3 | D4 | D5 | D6 | D7 | Overall |
| Park 2020 | Low | Low | Low | Low | Low | Low | Low | Good |
| Simmons 2020 | Low | Low | Low | Low | Low | Low | Low | Good |
| Smailey 2021 | Unclear | Unclear | Low | Low | High | Low | Low | Very poor |
| Krebs 2019 | Unclear | Unclear | Low | Low | High | Low | Low | Poor |
| Ostroff 2013 | Low | Low | Low | Low | High | Unclear | Low | Fair |
D1: Random sequence generation, D2: Allocation concealment, D3: Selective reporting,
D4: Other bias, D5: Blinding of participants, D6: Blinding of outcome assessment,
D7: Incomplete outcome data