| Methods |
RCT, unblinded. |
| Participants |
49 participants. 45 men, 4 women. Mean age 26.44 years. New and recurrence sinuses. |
| Interventions |
Open healing (open excision and secondary healing) vs off‐midline closure (rhomboid excision and classic Limberg flap). |
| Outcomes |
Healing time, recurrence, SSI, operating time, pain, other complications. |
| Notes |
Follow up of about 92% at 18 months average. |
| Risk of bias |
| Bias |
Authors' judgement |
Support for judgement |
| Adequate sequence generation? |
Unclear risk |
Quote: "Blocked randomization was used". No information of the process of selection (e.g. random number table, or computer random number generation) |
| Allocation concealment? |
Unclear risk |
Not reported. |
| Incomplete outcome data addressed?
All outcomes |
High risk |
Exclusion criteria were cases with incomplete participant data and participants who were lost to follow up. |
| Free of selective reporting? |
Unclear risk |
Element of under reporting: Not enough information to extract operative time. |
| Free of other bias? |
Unclear risk |
All participants were operated under general or spinal anaesthesia. No information on the number of participants who had general or spinal anaesthesia by intervention. |
