Comparison 5. Incidence of multiple end points (death or myocardial infarction) over all time periods.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
5.1 Heparin vs placebo or untreated control	8	3110	Risk Ratio (M‐H, Fixed, 95% CI)	0.61 [0.47, 0.80]
5.1.1 LMWH	2	1602	Risk Ratio (M‐H, Fixed, 95% CI)	0.34 [0.18, 0.61]
5.1.2 UFH	5	1225	Risk Ratio (M‐H, Fixed, 95% CI)	0.80 [0.58, 1.08]
5.1.3 UFH + warfarin	2	283	Risk Ratio (M‐H, Fixed, 95% CI)	0.43 [0.15, 1.28]