Table 2.
Risk of bias assessment according to the Cochrane collaboration’s risk of bias assessment tool.
| Study, Year (reference) | Random sequence generation | Allocation concealment | Blinding of participant and personnel | Blinding of outcome assessment | Incomplete outcome data | Selective reporting | Overall assessment of risk of bias |
|---|---|---|---|---|---|---|---|
| Harcourt 2011 | Unclear | Unclear | Unclear | Unclear | Low | Low | Unclear |
| Uribarri 2011 | Low | Unclear | Unclear | Low | Low | Low | Unclear |
| de Courten 2016 | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
| Mark 2014 | Low | Unclear | Unclear | Unclear | Low | Low | Unclear |
| Macías-Cervantes 2015 | Low | Unclear | Low | Low | Low | Unclear | Unclear |
| Tantalaki 2014 | Low | Low | Unclear | Low | Low | Low | Unclear |
| Di Pino 2016 | Unclear | Unclear | Unclear | Unclear | Low | Low | Unclear |
| Vlassara 201(28) | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
| Cai 2004(13) | Low | Low | Unclear | Low | Unclear | Low | Unclear |
| Vlassara 2002 | Low | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
| Baye 2017 | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
| Yacoub 2017 | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear | Unclear |
| Uribarri 2014 | High | High | Unclear | Unclear | Unclear | Low | High |