Table 1. Demographic and clinical features of CRC patients and healthy subjects^a.

Variables	Internal Validation set (n = 85)	Independent Validation set (n = 90)	Healthy Subjects (n = 130)
Age (years)
Mean (SD)	58.7(12.3)	56.6(10.7)	54.1(7.5)
≥65, No.	26	28	51
<65,No.	60	62	79
Sex, No.
Male	53	60	70
Female	32	30	50
Follow-up time, months
Median	36.0	32.0
Range	33.0–38.1	27.5–35.0
Recurrence rates
1 year	13/85	10/89
3 year	19/85	23/89
Histological grade, No.
Middle-Low	76	74
High	9	16
Tumor location, No.
Colon	37	37
Rectum	49	53
TNM stage, No.
II	52	49
III	34	41
Adjuvant chemotherapy
Received	37	43
Did not received	48	42

^aData are presented as Mean ± SD.