A randomized study would answer the question.
Jollis
J G
JG
Califf
R M
RM
D001026:Coronary Artery Bypass; D003327:Coronary Disease / Q000601:surgery*; D015276:Health Care Rationing / Q000458:organization & administration*; D006302:Health Services Research; D006801:Humans; D017063:Outcome Assessment, Health Care; D016032:Randomized Controlled Trials as Topic; D012107:Research Design; D012307:Risk Factors; D014850:Waiting Lists