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| Methods | See ab Rocchi 1979a | |
| Participants | ||
| Interventions | ||
| Outcomes | ||
| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Unclear risk | Unclear |
| Allocation concealment (selection bias) | Unclear risk | Not used |
| Blinding (performance bias and detection bias) All outcomes | Unclear risk | Unclear |
| Incomplete outcome data (attrition bias) All outcomes | Unclear risk | Unclear |
| Summary assessment | Unclear risk | Unclear |
