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| Methods | Randomised Controlled Trial | |
| Participants | Patients with chronic anal fissure | |
| Interventions | Controlled‐intermittent anal dilation (20) versus Lateral internal sphincterotomy (20) | |
| Outcomes | Fissure healing, pain, bleeding | |
| Notes | ||
| Risk of bias | ||
| Bias | Authors' judgement | Support for judgement |
| Random sequence generation (selection bias) | Low risk | sealed envelopes |
| Blinding of outcome assessment (detection bias) All outcomes | High risk | not stated |
| Drop‐outs All outcomes | Low risk | zero |
