ROC curve for the prediction of MACE within 1 year after STEMI. Area under the curve (AUC) of H3Cit-DNA plasma level was 0.69. Youden index revealed H3Cit-DNA level of 219.3 μg/L as the ideal threshold (blue dot). Corresponding values for sensitivity and specificity are 0.493 and 0.833, respectively. Threshold at the highest third of H3Cit-DNA plasma level showed sensitivity and specificity values of 0.567 and 0.748, respectively (red dot).