Rehospitalization for myocardial infarction at 1 year occurred in 2.7 % and 2.7 % of the patients , respectively ( hazard ratio , 0.97 ; 95 % CI , 0.73 to 1.28 ; P = 0.81 ) , and stent thrombosis in 0.7 % and 0.9 % , respectively ( hazard ratio , 0.84 ; 95 % CI , 0.50 to 1.40 ; P = 0.51 ) .