Table 3.

Diagnostic indices of NICpro, dNIC in PP, AP, and VP, and other methods for differentiating malignant and benign SPNs.

Criteria	AUC	Sensitivity	Specificity	TP	FP	FN	TN	PPV	NPV (%)
		(%)	(%)					(%)
NICpro(PP)>0.40	0.644	77	57	26	13	13	8	67	38
NICpro(AP)>0.47	0.716	67	57	3	0	36	21	100	37
NICpro(VP)>0.36	0.714	89	52	35	10	4	11	78	73
dNIC(PP) >-0.35	0.923	92	95	37	13	1	9	74	90
dNIC(AP) >0.00	0.924	89	90	35	2	4	19	94	82
dNIC(VP) >-0.07	0.933	93	95	37	1	2	20	97	90
Visual assessment (conventional CT)	0.707	79	62	31	8	8	13	79	62