Table 2.
Bias risk assessment by modified Cochrane risk of bias tool
| Domains | Barbosa et al. (2016) | Budni et al. (2013) | Ribeiro et al. (2010) | Maçao et al. (2007) | Sousa et al. (2008) | Rassi et al. (2002) |
|---|---|---|---|---|---|---|
| Randomised sequence generation | NA | NA | NA | NA | NA | NA |
| Allocation masking | NA | NA | NA | NA | NA | NA |
| Selective data report | NC | NC | NC | NC | NC | NA |
| Blinding (participants and staff) | NA | NA | NA | NA | NA | NA |
| Blinded (outcome evaluation) | NC | NC | NC | NC | NC | NA |
| Incomplete results data | NC | NC | NC | NC | NC | NA |
NA, not applicable; NC, not clear.