Table 7. Diagnostic performance of the DWI combination analysis by lesion size.

	MR size ≤1 cm	MR size >1 cm	p-value†
Sensitivity (%)	80.00	95.60	0.0340
Specificity (%)	76.00	71.43	>0.9999
PPVa (%)	72.73	97.75	<0.0001
NPVb (%)	82.61	55.56	0.0745
Accuracy (%)	77.78	93.88	0.0745
AUCc (95% CId)	0.78	0.84	0.6231

^aPPV, positive predictive value

^bNPV, negative predictive value

^cAUC, area under the curve

^dCI, confidence interval.

†p-values were calculated using a Chi-square test and Hanley JA & McNeil BJ's method to determine the difference between two independent AUCs.