Table 5.
ROC analysis. Diagnostic performance of significant parameters of gray-sale US, Doppler US, CEUS, and sonoelastography in the detection of metastatic lymph nodes.
| Criterion | AUC | SE (%) |
SP (%) |
Statistical Sig. | Cutoff Value | CI 95% | PPV (%) |
NPV (%) |
Acc (%) |
|---|---|---|---|---|---|---|---|---|---|
| S/L Ratio | 0.812 | 83.3 | 78.6 | Good | 0.550 | 0.724–0.899 | 83.33 | 78.57 | 81.25 |
| L axis | 0.689 | 50.0 | 92.9 | Poor | 1.860 | 0.583–0.794 | 90.00 | 59.09 | 68.75 |
| S axis | 0.798 | 64.8 | 85.7 | Fair | 0.854 | 0.711–0.885 | 85.37 | 65.45 | 73.96 |
| RI | 0.837 | 83.0 | 75.0 | Good | 0.565 | 0.753–0.921 | 81.02 | 77.45 | 80.00 |
| PI | 0.798 | 83.0 | 65.0 | Fair | 1.025 | 0.705–0.891 | 75.31 | 74.86 | 75.14 |
| WOT (s) | 0.818 | 84.0 | 74.4 | Good | 133.0 | 0.727–0.910 | 80.81 | 78.33 | 79.78 |
| ES | 0.928 | 88.9 | 90.5 | Excellent | 2.5 | 0.871–0.986 | 89.69 | 86.36 | 89.71 |
Legend: AUC—area under the curve; SE—sensitivity; SP—specificity; PPV—positive predictive value; NPV—negative predictive value; Acc—accuracy; RI—resistivity index; PI—pulsatility index; WOT—wash-out time; ES—elasticity score.