Evaluation of internal and shell stiffness in the differential diagnosis of breast non-mass lesions by shear wave elastography

Table 4 Sensitivity, specificity, accuracy, cutoff value and the area under the curve of each parameter

Parameter	Sensitivity (%)	Specificity (%)	Accuracy (%)	Cutoff value	AUC
“Stiff rim” sign	50.00	90.91	72.88	-	-
Emax	74.33	66.80	67.05	67.61	0.707
Emean	54.95	68.47	59.86	28.05	0.626
Emin	36.15	49.60	43.64	4.96	0.425
Esd	70.18	63.67	68.93	11.30	0.687
E1 max	83.61	75.01	75.04	84.65	0.795
E1 mean	68.29	57.94	63.69	33.08	0.647
E1.5 max	83.00	74.18	77.00	95.60	0.789
E1.5 mean	74.48	63.95	65.24	36.24	0.692
E2 max	86.36	76.04	80.06	100.50	0.826
E2 mean	75.53	66.11	68.51	33.97	0.704
E2.5 max	94.57	85.86	87.44	94.62	0.900
E2.5 mean	79.05	70.04	80.51	36.17	0.746
E3 max	90.52	81.83	84.03	88.56	0.881
E3 mean	76.82	68.11	76.86	35.48	0.734

AUC: The areas under the curve; Emax: Maximum; Emean: Mean; Min: Minimum; Esd: Elastic values and the standard deviation.