Table 3 the diagnostic performances of the characteristics of conventional high-frequency ultrasound and elastic indices of shear wave elastography for metastatic small cervical lymph nodes in nasopharyngeal carcinoma patients
Characteristics | Area Under Curve (mean ± SD) | Sensitivity (%) | Specificity (%) | Positive Predictive Value (%) | Negative Predictive Value (%) | Accuracy (%) | p Value | 95% C.I. Lower-Upper |
|---|---|---|---|---|---|---|---|---|
Shape | 0.583 ± 0.089 | 20.0 | 97.7 | 60.0 | 83.3 | 81.3 | 0.321 | 0.409–0.758 |
Boundary | 0.550 ± 0.086 | 33.3 | 77.7 | 26.3 | 82.1 | 68.0 | 0.551 | 0.382–0.718 |
Long axis (mm) | 0.592 ± 0.077 | 93.3 | 25.0 | 24.7 | 94.8 | 39.7 | 0.275 | 0.443–0.740 |
Minor axis (mm) | 0.658 ± 0.071 | 73.3 | 58.3 | 31.6 | 90.7 | 61.3 | 0.059 | 0.507–0.809 |
Long axis/minor axis | 0.692 ± 0.073 | 87.0 | 58.3 | 36.4 | 95.1 | 67.7 | 0.022 | 0.549–0.835 |
Hilum | 0.783 ± 0.063 | 87.7 | 70.0 | 42.9 | 95.5 | 73.3 | 0.001 | 0.660–0.907 |
Inhomogeneous thickening of the cortex | 0.708 ± 0.065 | 93.3 | 48.3 | 31.1 | 97.7 | 57.3 | 0.013 | 0.581–0.386 |
Blood flow signals | 0.608 ± 0.073 | 100.0 | 22.7 | 24.2 | 100.0 | 37.3 | 0.197 | 0.466–0.751 |
Five-point-scale (=2 vs > 2) | 0.725 ± 0.064 | 93.3 | 52.7 | 33.6 | 97.9 | 60.0 | 0.007 | 0.600–0.850 |
Emax (kPa) | 0.733 ± 0.067 | 87.7 | 60.0 | 35.1 | 95.7 | 65.3 | 0.005 | 0.602–0.824 |
Emin (kPa) | 0.683 ± 0.071 | 86.7 | 50.0 | 30.2 | 93.8 | 57.3 | 0.018 | 0.545–0.822 |
Emean (kPa) | 0.784 ± 0.067 | 80.0 | 66.7 | 37.5 | 93.0 | 69.3 | 0.001 | 0.595–0.872 |