Application Value of Serum TK1 and PCDGF, CYFRA21-1, NSE, and CEA plus Enhanced CT Scan in the Diagnosis of Nonsmall Cell Lung Cancer and Chemotherapy Monitoring

Table 4

Comparison of sensitivity and specificity between stand-alone detection and joint detection.

Variables	Positive if greater than or equal to^a	Sensitivity	1-Specificity
TK1	-1.0000	1.000	1.000
	0.5000	0.533	0.200
	2.0000	0.000	0.000
PCDGF	-1.0000	1.000	1.000
	0.5000	0.467	0.200
	2.0000	0.000	0.000
CYFRA21-1	-1.0000	1.000	1.000
	0.5000	0.633	0.233
	2.0000	0.000	0.000
NSE	1.0000	1.000	1.000
	0.5000	0.633	0.233
	2.0000	0.000	0.000
CEA	1.0000	1.000	1.000
	0.5000	0.633	0.133
	2.0000	0.000	0.000
CT	1.0000	1.000	1.000
	0.5000	0.600	0.133
	2.0000	0.000	0.000
TK1+PCDGF+CYFRA21-1+NSE+CEA	1.0000	1.000	1.000
	0.5000	0.767	0.133
	2.0000	0.000	0.000
Joint detection	1.0000	1.000	1.000
	0.5000	0.800	0.100
	2.0000	0.000	0.000