Comparison 3. Positive margins.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 ROLL versus WGL	5	517	Risk Ratio (M‐H, Random, 95% CI)	0.74 [0.42, 1.29]
2 RSL versus WGL	2	366	Risk Ratio (M‐H, Fixed, 95% CI)	0.67 [0.43, 1.06]