Costantini 2007.

Methods	Trial design: single‐centre randomised controlled trial
Participants	Number of participants randomised: 66 (group A 34, group B 32) Number of participants analysed: 66 Mean age (mean ± SD): group A = 63 ± 9, group B = 61 ± 8 Inclusion criteria: continent women (women with negative stress test before and after prolapse reduction, no preoperative symptoms of urinary incontinence, negative symptom questionnaire, and no leakage during urodynamics) with 'severe' uterovaginal and vault prolapse (not clearly defined) Exclusion criteria: not stated Setting: University of Perugia, Itali Timing: January 2000 to December 2004
Interventions	Intervention: group A sacrocolpopexy + Burch colposuspension (n = 34) Comparison: group B sacrocolpopexy alone (n = 32)
Outcomes	Primary outcome/s: changes in continence status, anatomical outcome of prolapse repair Secondary outcome/s: changes in subjective symptoms, quality of life measured by IIQ‐7 and UDI‐6
Notes	Urinary incontinence was clinically classified "on the basis of the ICS definition and graded on the Ingelman Sunderberg scale". Intention‐to‐treat analysis: All randomised participants were analysed. Sample size calculation: yes, 66 participants calculated to provide 80% to 85% power to detect a 25% to 30% difference in proportion of postoperative incontinence between groups Trial registration: no Funding: not stated Conflicts of interest: not stated
Risk of bias
Bias	Authors' judgement	Support for judgement
Random sequence generation (selection bias)	Low risk	Computer generated
Allocation concealment (selection bias)	Unclear risk	No details provided of method used to conceal group allocation.
Blinding of participants and personnel (performance bias) All outcomes	Unclear risk	Trial personnel who performed the surgery were not blinded. No details of blinding of participants were provided.
Blinding of outcome assessment (detection bias) All outcomes	Low risk	Outcome assessors were blinded to group allocation.
Incomplete outcome data (attrition bias) All outcomes	Low risk	3/34 group A and 2/32 group B participants lost to follow‐up
Selective reporting (reporting bias)	Unclear risk	Preoperative UDI scores were given, but no postoperative UDI scores were available.
Other bias	Unclear risk	Primary continence assessments were based on a non‐defined stress test and symptoms from the UDI Questionnaire.