Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Need for re-treatment
Systematic review	Premenopausal women with heavy periods Data from 1 RCT	Rates of hysterectomy 5+ years 23/61 (38%) with rollerball ablation 16/59 (27%) with transcervical endometrial resection	RR 1.39 95% CI 0.82 to 2.36 P = 0.22		Not significant
Systematic review	Premenopausal women with heavy periods 2 RCTs in this analysis	Need for re-treatment 1 year 32/197 (16%) with laser ablation 37/191 (19%) with transcervical endometrial resection	RR 0.84 95% CI 0.55 to 1.29 P = 0.43		Not significant
Systematic review	Premenopausal women with heavy periods Data from 1 RCT	Need for further surgery 2 years 15/61 (25%) with rollerball ablation 14/59 (24%) with transcervical endometrial resection	RR 1.04 95% CI 0.55 to 1.95 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