Ref (type)	Population	Outcome, Interventions	Results and statistical analysis	Effect size	Favours
Mortality
[91] Systematic review	549 people with left ventricular ejection fraction (LVEF) <50%, coronary artery disease, and deemed eligible for either CABG or drug treatment 7 RCTs in this analysis Subgroup analysis	Mortality 5 years Not reported with CABG 25% with drug treatment Absolute numbers not reported	OR 0.59 95% CI 0.39 to 0.91 P = 0.02	Small effect size	CABG