Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Need for re-treatment
Systematic review	120 women with heavy dysfunctional bleeding	Rates of hysterectomy 5+ years 23/61 (38%) with rollerball ablation 16/59 (27%) with transcervical endometrial resection	OR 1.63 95% CI 0.75 to 3.52 P = 0.22		Not significant
Systematic review	388 premenopausal women 2 RCTs in this analysis	Need for re-treatment 1 year 32/197 (16%) with laser ablation 37/191 (19%) with transcervical endometrial resection	OR 0.81 95% CI 0.48 to 1.36 P = 0.43		Not significant
Systematic review	120 premenopausal women Data from 1 RCT	Need for re-treatment 2 years 15/61 (25%) with rollerball 14/59 (24%) with transcervical endometrial resection	OR 1.05 95% CI 0.45 to 2.42 P = 0.91		Not significant
RCT	50 women	Re-intervention 2 years 36% with 5-mm rollerball with unmodulated cutting current 32% with 5-mm rollerball with modulated coagulating current Absolute numbers not reported	P = 0.75		Not significant