Gupta 2003.

Methods	Randomized controlled trial
Participants	Patients with chronic fissure and anal papilae
Interventions	Sphincterotomy plus or minus excision of associated anal papillae
Outcomes	Satisfaction score, wound related symptoms
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	adequate
Blinding of outcome assessment (detection bias) All outcomes	Low risk	physicians examining for recurrence / complications were blinded to patient operative classification
Drop‐outs All outcomes	Low risk	zero