Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
| ROC index | Value | 95% confidence interval |
|---|---|---|
| Area under the ROC curve (AUC) | 0.568 | 0.470 to 0.663 |
| z statistic | 1.229 | |
| P value (AUC0 = 0.5)a | 0.219 | |
| Cut-off criterion | >7.5 mm | |
| Youden index (J) | 0.1929 | |
| Accuracy | 57.8% | |
| Sensitivity | 82.0% | 68.6%–91.4% |
| Specificity | 37.3% | 25.0%–50.9% |
| Positive likelihood ratio (+LR) | 1.3 | 1.0–1.7 |
| Negative likelihood ratio (−LR) | 0.5 | 0.2–1.0 |
| Positive predictive value (+PV) | 52.6% | 40.9%–64.0% |
| Negative predictive value (−PV) | 71.0% | 52.0%–85.9% |
aDeLong method.
