Table 2.

Univariate and multivariate analyses of log-transformed serum CEA.

	Univariate analysis	Multivariate analysis
		Total population		Training set	Test set
N = 18,131	P value	Regression coefficient	P value	P value	P value
Gender (ref.: male)	<0.001	−0.051	<0.001	<0.001	<0.001
Age	<0.001	0.005	<0.001	<0.001	<0.001
BMI	<0.001	−0.006	<0.001	<0.001	<0.001
WBC	<0.001	0.008	<0.001	0.016	<0.001
HB	<0.001	0.016	<0.001	<0.001	<0.001
AST	<0.001	0.002	<0.001	0.005	0.005
Creatinine	<0.001	0.062	0.014	0.038	0.167
HbA1c	<0.001	0.054	<0.001	<0.001	<0.001