Gough 1990b.

Methods	2‐arm quasi‐randomised controlled trial. Clean/contaminated (class 2) surgery
Participants	210 boys with medical indications for circumcision including persistent painful micturition with phimosis, > 2 episodes of balanoposthitis, true phimosis after 10 years of age and balanitis xerotica obliterans. Exclusion criterion: non‐retracting prepuce under the age of 10 without symptoms Setting: boys with medical indication for circumcision at a children's hospital in Manchester, UK
Interventions	Intervention: sofretulle dressing tied in place with sutures after wound closure. Sutures were released at 24 h to allow dressing to fall away spontaneously. Comparative intervention: paraffin tulle dressing tied in place with sutures after wound closure. Sutures were released at 24 h to allow dressing to fall away spontaneously.
Outcomes	Wound healing (0‐3 scale, 3 = healed) assessed at 1 week
Notes	Definition of wound healing: self‐devised 4‐point clinical scale Concurrent illness: none reported
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Quote: "Patients were allocated alternatively to paraffin tulle or sofratulle dressing."
Allocation concealment (selection bias)	High risk	Comment: allocation concealment was not reported. Alternate allocation would allow prediction of sequence.
Blinding of participants and personnel (performance bias) All outcomes	High risk	Comment: blinding was not reported.
Blinding of outcome assessment (detection bias) All outcomes	High risk	Comment: blinding of outcome assessor was not reported.
Incomplete outcome data (attrition bias) All outcomes	Low risk	Comment: outcome data were presented for all participants.
Selective reporting (reporting bias)	Unclear risk	Comment: outcome data were presented for all outcomes listed in methods section. Study protocol was not available for identification of any unreported outcomes.
Other bias	Low risk	Comment: none were identified.