Receiver Operating Characteristic (ROC) Curve Comparisons for Initial, Maximum, and Change in Troponin on Acute Myocardial Infarction
| Troponin Comparison | Difference in ROC Curves | 95% Wald Confidence Limits | P Value |
|---|---|---|---|
| Maximum vs initial | 0.0839 | 0.0737 to 0.0941 | <0.0001 |
| Change vs initial | 0.0377 | 0.0237 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.