Table 3. The diagnostic performances of SWS imagine in predicting thyroid malignancy with different sizes.

SWS indices	Cut-off value		SEN (%)	SPE (%)	PPV (%)	NPV (%)	ACU (%)	AUC&	P*	P#	P&	P^
Nodule size ≤ 10 mm (n = 123)									0.528	0.083	0.031	0.003
E-max	kpa	24.4	76.9	76.2	60.0	87.7	76.4	0.776 (0.692,0.846)
	m/s	2.82	76.9	72.6	56.6	87.1	74.0	0.788 (0.705,0.857)
E-mean	kpa	19.3	43.6	88.1	63.0	77.1	74.0	0.696 (0.607,0.776)
	m/s	2.61	41.0	89.3	64.0	76.5	74.0	0.672 (0.581,0.754)
11 ≤ Nodule size ≤ 20 mm (n = 132)									0.668	0.334	0.583	0.435
E-max	kpa	46.9	80.0	91.5	85.1	88.2	87.1	0.894 (0.829,0.941)
	m/s	3.92	78.0	92.7	86.7	87.4	87.1	0.895 (0.830,0.942)
E-mean	kpa	22.5	74.0	91.5	84.1	85.2	84.8	0.883 (0.815,0.932)
	m/s	2.45	82.0	84.1	76.0	88.5	83.3	0.876 (0.808,0.927)
Nodule size >20 mm (n = 67)									0.193	0.685	0.251	0.911
E-max	kpa	52.4	88.2	82.0	62.5	95.3	83.6	0.810 (0.696,0.896)
	m/s	4.13	94.1	84.0	66.7	97.7	86.6	0.883 (0.781,0.949)
E-mean	kpa	27.8	70.6	92.0	75.0	90.2	86.6	0.886 (0.785,0.951)
	m/s	2.67	76.5	88.0	68.4	91.7	85.1	0.877 (0.774,0.945)

AUC=area under receiver curve; ACU,=accuracy; NPV=negative predictive value; PPV=positive predictive value; SEN=sensitivity; SPE= specificity; SWS=shear wave speed; E-max = the max value of shear wave speed imagine; E-mean = the mean value of shear wave speed imagine ;

^& Note–numbers in parentheses are 95% confidence intervals (CI)

P* AUC in comparison with that of E-max between elasticity and speed

P^# AUC in comparison with that of E-mean between elasticity and speed

P^& AUC in comparison with that of E-max elasticity and E-mean elasticity

P^{^} AUC in comparison with that of E-max speed and E-mean speed