Table 7.

Comparison of Sensitivity and Specificity of Serum Markers in the Lung Cancer Group by Combined Detection

	Sensitivity (%)	Specificity (%)	AUC	Youden’s Index	P	95% CI
CEA+CRP	84.8	75	0.866	0.012	<0.001	0.798–0.935
CEA+SF	69.7	90	0.813	0.97	<0.001	0.732–0.894
CRP+SF	81.8	75	0.856	0.011	<0.001	0.780–0.932
CEA+CRP+SF	80.3	82.5	0.890	0.00012	<0.001	0.829–0.951