Table 2 Risk of bias summary in included studies
Bias | AhmedAli (2021) | Aminoff (2021) | Egan (2021) | Heyrat (2020) | Li (2020) | Liu (2021) | Shabahang (2020) | Shabahang (2021) | Song (2021) | Dinarvand (2022) | Wahlund (2020) |
|---|---|---|---|---|---|---|---|---|---|---|---|
Random sequence generation (selection bias) | ? | Y | ? | N | ? | ? | ? | ? | ? | N | ? |
Allocation concealment (selection bias) | ? | Y | Y | ? | Y | Y | N | Y | N | N | Y |
Blinding of participants and personnel (performance bias) | N | N | N | N | N | N | N | N | N | N | N |
Blinding of outcome assessment (detection bias) | N | N | N | N | N | N | N | N | N | N | Y |
Incomplete outcome data (attrition bias) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
Selective reporting (reporting bias) | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |
Other bias | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y | Y |