Figure 1. Univariate Cox regression for prognostic factors of over-70 group patients. Univariate Cox regression analysis of fatality risk factors in over-70 patients. Elevated myocardial enzymes were defined if serum LDH or CK was above the upper reference limit. Data are represented as means with 95% confidence intervals. Abbreviations: CI, confidence interval; CRP, C-reactive protein; ALT, alanine aminotransferase; AST, aspartate aminotransferase; Cr, creatinine; LDH, lactate dehydrogenase; CK, creatine kinase.