Comparison 1. Polycythaemia vera.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 Mortality for thrombotic events	2	630	Odds Ratio (M‐H, Fixed, 95% CI)	0.20 [0.03, 1.14]
2 All cause mortality	2	630	Odds Ratio (M‐H, Fixed, 95% CI)	0.46 [0.21, 1.01]
3 Major bleeding	2	630	Odds Ratio (M‐H, Fixed, 95% CI)	0.99 [0.23, 4.36]
4 Minor bleeding	2	630	Odds Ratio (M‐H, Fixed, 95% CI)	1.85 [0.90, 3.79]