| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | High/low/unclear risk | Quote: "…" Comment: |
| Allocation concealment (selection bias) | High/low/unclear risk | Quote: "…" Comment: |
| Blinding of participants and personnel (performance bias) | High/low/unclear risk | Quote: "…" Comment: |
| Blinding of outcome assessment (detection bias) | High/low/unclear risk | Quote: "…" Comment: |
| Incomplete outcome data (attrition bias) | High/low/unclear risk | Quote: "…" Comment: |
| Selective reporting (reporting bias) | High/low/unclear risk | Quote: "…" Comment: |
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