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Assessment of risk of bias in included studies
| Study | Year | Random sequence generation | Allocation concealment | Blinding of participants and staff | Blinding of outcome assessment | Incomplete outcome data | Selective outcome reporting |
|---|---|---|---|---|---|---|---|
| Morley et al7 | 2008 | Low | Low | High | Unclear | Low | Low |
| SUPPORT8 | 2010 | Low | Low | High | Unclear | Low | Low |
| Sandri et al10 | 2010 | Low | Low | High | Unclear | Low | Low |
| Dunn et al9 | 2011 | Low | Low | High | Unclear | Low | Low |
