| Selection bias | Performance bias | Detection bias | Attrition bias | Reporting bias | ||
---|---|---|---|---|---|---|---|
Study | Random sequence generation | Allocation concealment | Blinding of participants and personnel | Blinding for patient reported outcomes | Blinding for clinical outcomes (mortality) | Incomplete outcome data | Selective reporting |
Hernandez et al. (2010) | Low | Low | Uncertain | Uncertain | Uncertain | Low | Low |
Gunduz et al. (2005) | High | High | High | High | High | Uncertain | Uncertain |
Bolliger and Van Eeden (1990) | High | High | High | High | High | Uncertain | Uncertain |