Wang 2011.

Methods	RCT comparing TVT, TVT‐O and TVT‐Secur
Participants	Total of 102 women included in this Chinese trial Inclusion criteria: women with urodynamically proven SUI. If MUI, then SUI was the predominant symptom Exclusion criteria: women with previous surgical procedures for SUI Mean age (years; SD): Group A: 56.6 (9.6); Group B: 56.0 (9.1) Mean BMI kg/m² (SD): Group A: 25.3 (2.0); Group B: 27.3 (1.9)
Interventions	Group A: TVT (n = 32) Group B: TVT‐O (n = 36) Group C: TVT‐ Secur (data not included in this review)
Outcomes	Objective cure: negative cough stress test Subjective cure: absence of SUI symptoms Improvement: negative or a positive cough stress test and reduced SUI symptoms: Mean length of surgery Bladder perforation Voiding dysfunction Groin pain De novo urgency or urgency incontinence Vascular injury
Notes	Power test calculation performed Women with SUI were put on anticholinergic treatment prior to surgery QoL assessment was performed using the ICI‐Q‐SF pre‐operatively; no data for post‐operative scores Cystoscopy routinely performed in TVT. Cystoscopy only performed if bladder injury was suspected in the TVT‐O group Follow‐up 1, 3, 6 and 12 months All women completed the trial (no loss to follow‐up)
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Quote: "computer generated randomisation"
Allocation concealment (selection bias)	Low risk	Quote: “allocation was concealed using opaque sealed envelopes”
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	Low risk	All participants completed follow‐up. All outcomes reported