Comparison 1. Quasi‐randomised studies of warfarin versus control in patients with chronic heart failure.

Outcome or subgroup title	No. of studies	No. of participants	Statistical method	Effect size
1 All cause deaths	3	942	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.48 [0.32, 0.71]
2 Cardiovascular deaths (stroke, myocardial infarction, pulmonary embolism, peripheral arterial embolism) and sudden deaths	3	942	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.34 [0.24, 0.47]
3 Non‐fatal cardiovascular events (non‐fatal stroke, myocardial infarction, pulmonary embolism, peripheral arterial embolism)	3	942	Peto Odds Ratio (Peto, Fixed, 95% CI)	0.24 [0.14, 0.41]
4 Major bleeding events	2	645	Peto Odds Ratio (Peto, Fixed, 95% CI)	1.52 [0.56, 4.10]