Study | Criteria for judging risk of bias for RCTs | Additional criteria for cluster RCTs | Other | |||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Recruitment to cluster | Baseline imbalance | Loss of clusters | Incorrect analysis | Compatibility with individual RCTs | Â | |
Althabe et al. (2017) [71] | Low | Unclear | High | Unclear | Low | Low | Low | Low | Low | Low | Low | - |
Bakker et al. (2003) [67] | Low | Unclear | High | High | High | Unclear | NA | NA | NA | NA | NA | - |
Bar-Zeev et al. (2019) [52] | Unclear | High | High | High | High | Low | High | Unclear | High | Low | Unclear | - |
Brownfoot et al. (2016) [53] | Low | Low | High | Unclear | Low | Unclear | NA | NA | NA | NA | NA | - |
Unclear | Unclear | High | High | High | Unclear | NA | NA | NA | NA | NA | - | |
Hajek et al. (2001) [68] | Low | Unclear | High | Unclear | Low | Unclear | NA | NA | NA | NA | NA | - |
Manfredi et al. (2011) [72] | Unclear | Unclear | High | Unclear | Unclear | Unclear | Low | Unclear | High | High | Unclear | - |
Omer et al. (2020) [51] | Low | Low | High | Unclear | Low | Unclear | Low | Low | Low | Low | Unclear | - |
Secker-walker et al. (1992) [73] | Unclear | Unclear | High | Unclear | Low | Unclear | NA | NA | NA | NA | NA | Higha |
Tsoh et al. (2010) [74] | Low | Low | High | Unclear | Low | Unclear | NA | N/A | NA | NA | NA | Higha |