Table 1. Demographics of included subjects.

	CRC preoperative	CRC postoperative	Gastric cancer	Healthy controls
n	70	30	30	30
Age	57.46 ± 12.54	58.57 ± 12.76	56.77 ± 13.28	54.37 ± 11.8
Gender
Male	45	20	18	20
Female	25	10	12	10
T stage				–
T1+T2	3	0	13
T3+T4	67	30	17
N stage				–
N0	3	0	10
N1+N2	67	30	20
M stage				–
M0	24	8	15
M1	46	22	15
				–
Grade
Well differentiated	15	8	12
Moderately differentiated	2	4	10
Poorly differentiated	53	8	8
Location			–	–
Colon	52	22
Rectal	18	8
CEA	14.14(8.74–180.64)	6.67(2.22–66.22)	2.64(1.76–3.54)	15.05(12.1–22.2)
CA125	27.13(19.25–35.43)	12.1(7.8–17.62)	12.88(8.52–20.78)	16.57(12.1–22.2)
CA153	23.04(19.22–27.75)	10.55(9.23–17.7)	10.16(8.28–13.5)	11.40(7.58–14.2)
CA199	26.61(19.04–119.73)	14.4(4.73–58.98)	8.18(5.86–14.77)	8.70(6.33–12.90)
SPINK4	3.72(2.09–4.67)	2.29(1.55–3.56)	2.68(2.45–3.39)	2.76 (2.60–2.88)

Notes.

Comparison of continuous data using variance or nonparametric methods; comparison of discrete distributions using Chi-square test.