DM was a predictor of 1-year repeat revascularization ( target lesion revascularization : hazard ratio : 1.34 ; 95 % confidence interval : 1.05 to 1.70 ; target vessel revascularization : hazard ratio : 1.40 ; 95 % confidence interval : 1.15 to 1.72 ) and cardiac death or myocardial infarction ( hazard ratio : 1.40 ; 95 % confidence interval : 1.09 to 1.81 ) .