Diagnostic and economic value of carcinoembryonic antigen, carbohydrate antigen 19-9, and carbohydrate antigen 72-4 in gastrointestinal cancers

Table 6 Correlation analysis and linear regression analysis of biomarker levels and clinical characteristics

		Age			Gender
		P value	Correlation coefficient	Regression coefficient	P value	Correlation coefficient	Regression coefficient
CEA	Whole	< 0.001	0.227	0.176	< 0.001	0.236	0.004
	With malignant tumors	< 0.001	0.231	0.263	< 0.001	0.144	-2.965
	Without malignant tumors	< 0.001	0.195	0.041	< 0.001	0.248	0.472
CA19-9	Whole	< 0.001	0.135	1.076	< 0.001	-0.070	-1.400
	With malignant tumors	< 0.001	0.111	1.898	0.356	-0.021	-
	Without malignant tumors	< 0.001	0.113	0.269	< 0.001	-0.071	-2.482
CA72-4	Whole	< 0.001	0.084	0.076	< 0.001	-0.043	-0.927
	With malignant tumors	0.064	0.042	-	0.814	-0.005	-
	Without malignant tumors	< 0.001	0.069	0.052	< 0.001	-0.044	-0.773

The bold font indicates that the P value was less than 0.05. CEA: Carcinoembryonic antigen; CA19-9: Carbohydrate antigen 19-9; CA72-4: Carbohydrate antigen 72-4.