Lee 2007.

Methods	RCT of TVT versus TVT‐O
Participants	120 women Inclusion criteria: women with USI Exclusion criteria: predominant urge incontinence or POP Women had similar characteristics with regard to age, parity, incontinence symptoms and menopausal status
Interventions	Group A: TVT (n = 60) Group B: TVT‐O (n = 60)
Outcomes	Duration of operation Intraoperative blood loss Postoperative pain Patient satisfaction Operative complications Cure: defined as no SUI symptoms and a negative cough‐stress test. Participants were considered to have improved if they had no leakage on the cough‐stress test but may have had occasional urine leakage during stress. However, this occasional leakage did not influence daily activities or require any further treatment. Participants who did not meet these criteria treatment were considered to have failed Follow‐up was for 12 months
Notes	Cystoscopy was performed only in the TVT group Mean follow‐up 13 months
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	High risk	Quote: "Patients were alternately assigned to the TVT or TVT‐O group" (Randomisation was by alternation method)
Allocation concealment (selection bias)	High risk	Not concealed
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	No information
Blinding of outcome assessment (detection bias) All outcomes	Unclear risk	No information
Incomplete outcome data (attrition bias) All outcomes	Unclear risk	No information