Table 1.

Characteristics of colorectal patients and healthy controls.

	Patients (n = 90)		Control (n = 151)
Characteristic	No.	%	No.	%
Age, year
Mean	66.45		36.29
Range	36–90		22–69
Gender
Female	45	50	101	67
Male	45	50	50	33
Primary Tumor
Colon	59	61	N/A
Rectal	33	34
Rectosigmoid	3	3
Others	2	2
Stage
I	6	6	N/A
II	11	12
III	30	33
IV	43	47
Differentiation
Well	2	2	N/A
Moderate	81	90
Poor	5	6
Unspecified	2	2
CEA, ng/mL
≥5	46	51	N/A
<5	44	49

N/A: not applicable; CEA: carcinoembryonic antigen.