Table 5.
ROC analysis results on the Validation group values of sensitivity, specificity, positive predictive value (PPV) and negative predictive value (NPV) refer to the best cut-off value assessed by the maximization of the Youden index).
| Variable | AUC | 95% CL | Significance level P | Youden index J | Associated criterion | Sensitivity | Specificity | PPV | NPV |
|---|---|---|---|---|---|---|---|---|---|
| Clinical index | 0.641 | 0.53 to 0.74 | 0.0650 | 0.313 | >0.215 | 38.94 | 92.44 | 58.33 | 84.73 |
| CT index | 0.722 | 0.614 to 0.814 | 0.0007 | 0.424 | >0.025 | 83.34 | 59.13 | 35.71 | 92.94 |
| Combined index | 0.764 | 0.659 to 0.850 | <0.0001 | 0.465 | >0.021 | 88.94 | 57.63 | 36.42 | 95.10 |