Comparison 1. Postvoid residual volume of urine measured after operation.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Time to postvoid residual volume of urine ≤ 50 mL	2	111	Mean Difference (IV, Random, 95% CI)	‐13.21 [‐24.02, ‐2.41]
2 Time to postvoid residual volume of urine ≤ 100 mL	2	58	Mean Difference (IV, Random, 95% CI)	‐9.59 [‐16.28, ‐2.90]
3 Postvoid residual volume of urine at 1 month after operation	1		Mean Difference (IV, Random, 95% CI)	Subtotals only
4 Postvoid residual volume of urine at 3 months after operation	1		Mean Difference (IV, Random, 95% CI)	Subtotals only
5 Postvoid residual volume of urine at 12 months after operation	1		Mean Difference (IV, Random, 95% CI)	Subtotals only