Table 4.
Area under the ROC curves (AUC).
| Test | Area | P-value | 95% CI |
|---|---|---|---|
| ≤ 4 h (group 1) | |||
| Cardio Detect (CardioD) | 0.568 | 0.542 | 0.350-0.787 |
| Troponin T (TropT) | 0.550 | 0.655 | 0.325-0.775 |
| Repeated CardioD | 0.733 | 0.127 | 0.449-1.017 |
| Combine CardioD & TropT | 0.744 | 0.049 | 0.520-0.969 |
| > 4 but ≤ 12 h (group 2) | |||
| CardioD | 0.698 | 0.113 | 0.493-0.903 |
| TropT | 0.857 | 0.004 | 0.650-1.064 |
| Repeated CardioD | 0.500 | 1.000 | -0.102 to 1.102 |
| Combine CardioD & TropT | 0.769 | 0.031 | 0.608-0.930 |
| > 12 but ≤ 24 h (group 3) | |||
| CardioD | 0.611 | 0.505 | 0.308-0.914 |
| TropT | 1.000 | 0.003 | 1.000-1.000 |
| Combine CardioD & TropT | 0.611 | 0.505 | 0.308-0.914 |
| > 24 h (group 4) | |||
| CardioD | 0.333 | 0.655 | -0.283 to 0.949 |
| TropT | 1.000 | 0.180 | 1.000 - 1.000 |
| Combine CardioD & TropT | 0.833 | 0.371 | 0.384-1.282 |
*The closer the ROC curve comes to the 45-degree diagonal line of the ROC space, the less accurate the test. An AUC of 1 represents a perfect test; elsewhere an area of 0.5 represents an uninformative test.