CABG patients were older ( 68.59.4 years vs. 64.110.7 years , P < 0.001 ) and more often had diabetes ( 28.7 % vs. 20.9 % , P = 0.01 ) and previous PCI ( 40.1 % vs. 19.8 % , P < 0.001 ) compared to patients without previous CABG .