Bashandy et al 16 | Cros et al 17 | Ali Hassn et al 19 | Kamiya et al 20 | Neethu et al 18 | O’Scanaill et al 21 | Versyck et al 22 | |
Random sequence generation (selection bias) | |||||||
Allocation concealment (selection bias) | |||||||
Blinding of participants (performance bias) | |||||||
Blinding of personnel (performance bias) | |||||||
Blinding of outcome assessment (detection bias) | |||||||
Incomplete outcome data (attrition bias) | |||||||
Selective reporting (reporting bias) | |||||||
Other bias | |||||||
Random sequence generation | |||||||
Allocation concealment | |||||||
Blinding of participants | |||||||
Blinding of personnel | |||||||
Blinding of outcome assessment | |||||||
Incomplete outcome data | |||||||
Selective reporting | |||||||
Other bias | |||||||
=low risk; =unclear risk of bias; =high risk of bias.