Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Re-intervention rate
RCT	160 premenopausal women	Re-intervention rate 1 year 20/71 (28%) with hydrothermablation 6/75 (8%) with bipolar radiofrequency ablation	RR 0.29 95% CI 0.12 to 0.67	Moderate effect size	bipolar radiofrequency ablation
RCT	81 premenopausal women	Re-intervention 1 year 2/26 (8%) with thermal balloon ablation 0/25 (0%) with bipolar radiofrequency ablation	P value not reported
Rates of hysterectomy
RCT	160 premenopausal women	Hysterectomy rates 1 year 8/71 (11%) with hydrothermablation 4/75 (5%) with bipolar radiofrequency ablation	RR 0.49 95% CI 0.15 to 1.5		Not significant
RCT	81 premenopausal women	Hysterectomy rates 1 year 1/26 (3.8%) with thermal balloon ablation 1/25 (4.0%) with bipolar radiofrequency ablation	P value not reported