Table 6.

Receiver Operating Characteristic (ROC) Curve Comparisons for Initial, Maximum, and Change in Troponin on Acute Myocardial Infarction

Troponin ComparisonDifference in ROC Curves95% Wald Confidence LimitsP Value
Maximum vs initial0.08390.0737 to 0.0941<0.0001
Change vs initial0.03770.0237 to 0.0517<0.0001
Change vs maximum–0.0462–0.0540 to –0.0385<0.0001
  • Note: Nonparametric comparisons of area under the ROC curves were performed to test for significant differences in the ability of each univariate model to predict acute myocardial infarction. The maximum troponin value model predicts acute myocardial infarction significantly better than the initial troponin model and the change in troponin model.