Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Intraoperative and postoperative complications
Systematic review	120 premenopausal women Data from 1 RCT	Fluid deficit 1/61 (1.6%) with rollerball 1/59 (1.7%) with transcervical endometrial resection	OR 0.32 95% CI 0.01 to 7.94 P = 0.48		Not significant
Systematic review	366 premenopausal women Data from 1 RCT	Fluid overload 15/185 (8%) with laser ablation 3/181 (2%) with transcervical endometrial resection	OR 5.24 95% CI 1.5 to 18.4 P = 0.009	Large effect size	transcervical endometrial resection
Systematic review	120 premenopausal women Data from 1 RCT	Perforation 0/61 (0%) with rollerball 1/59 (2%) with transcervical endometrial resection	OR 0.32 95% CI 0.01 to 7.95 P = 0.48		Not significant