By multivariable analysis , peak CK-MB concentration and AUC measurement were independently associated with 6-month mortality ( adjusted hazard ratio [ HR ] 1.15 , 95 % CI 1.05-1 .25 , per 100-ng/mL increase , P = .002 ; and adjusted HR 1.09 , 95 % CI 1.03-1 .14 , per 1,000-ng / [ mL h ] increase , P < .001 , respectively ) and 90-day death or congestive heart failure ( adjusted HR 1.26 , 95 % CI 1.18-1 .34 , P < .001 ; and adjusted HR 1.15 , 95 % CI 1.11-1 .19 , P < .001 , respectively ) .