Variable Cutoff Sensitivity% Specificity% NPV% PPV% Area Copeptin 51.7 97 88.2 93.8 94.1 0.98 CTn-I 1.017 90.9 64.7 78.6 83.3 0.81 CK-MB 146 69.7 64.7 52.4 79.3 0.77

Table 8: The cutoff, sensitivity, specificity, NPV, PPV and area under ROC curve of copeptin, cTn-I and CK-MB at three hours.