Comparison 8. Sensitivity analysis no.3.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 OPEN; Pain score at day 1	6	611	Mean Difference (IV, Random, 95% CI)	‐2.08 [‐3.32, ‐0.83]
2 OPEN; Postoperative bleeding	7	645	Odds Ratio (M‐H, Random, 95% CI)	0.39 [0.12, 1.22]
3 OPEN; Urinary retention	6	533	Odds Ratio (M‐H, Random, 95% CI)	0.53 [0.19, 1.50]
4 OPEN; Anal stenosis	6	513	Odds Ratio (M‐H, Random, 95% CI)	1.0 [0.06, 16.17]
5 OPEN; Symptoms of incontinence at follow‐up	5	478	Odds Ratio (M‐H, Random, 95% CI)	0.66 [0.11, 3.95]
6 OPEN; Hospital stay in days	4	380	Mean Difference (IV, Random, 95% CI)	‐0.02 [‐0.45, 0.41]