Table 4. Diagnostic performance of the nodule parameters only and both the nodule parameters and normal peripheral zone PI or AUC.
| Parameters | Sensitivity (%) | Specificity (%) | PPV (%) | NPV (%) | AUC (%) | |
|---|---|---|---|---|---|---|
| PI | PID only | 66.7 (36/54) | 73.7 (56/76) | 64.3 (36/56) | 75.7 (56/74) | 78.4 (70.4–86.5) |
| PID + PIN | 79.6 (43/54) | 90.8 (69/76) | 86.0 (43/50) | 86.3 (69/80) | 92.3 (87.6–96.9) | |
| AUC | AUCD only | 53.7 (29/54) | 81.6 (62/76) | 67.4 (29/43) | 71.3 (62/87) | 75.8 (67.3–84.3) |
| AUCD + AUCN | 72.2 (39/54) | 92.1 (70/76) | 86.7 (39/45) | 82.4 (70/85) | 89.1 (83.2–95.1) | |
PI: peak intensity, AUC: area under the curve, PPV: positive predictive value, NPV: negative predictive value. D = nodule peripheral zone tissue, N = normal peripheral zone tissue.
The AUC values are followed by the 95% CIs in parentheses.