Table 3 Methodological quality: Risk of bias
| Â | Westrom | Goetz | Eisenberg | Sundberg |
|---|---|---|---|---|
Random sequence generation | Low | Low | Low | Low |
Concealment of allocation | Low | Low | Low | Low |
Blinding of care provider | High | High | High | High |
Blinding of participants | High | High | High | High |
Blinding of outcome assessment | High | High | High | Partial |
Incomplete outcome data | n/a | n/a | Low | Low |
Selective reporting | n/a | n/a | Low | Low |