Table 1. The main clinic characteristics of the 413 COAD patients.

Characteristic		All cohort number (n = 413)	Training number (n = 207)	Validation number (n = 206)	P value
Age	≧60	295	155	140	0.12
	<60	118	52	66
Gender	Male	192	92	100	0.404
	Female	221	115	106
Pathologic stage	Stage I/II	230	117	113	0.687
	Stage III/IV	172	84	88
	Unknow	11	6	5
T classification	T1 + T2	83	40	43	0.694
	T3 + T4	330	167	163
N classification	N0	245	124	121	0.809
	N1 + N2	168	83	85
M classification	M0	307	160	147	0.103
	M1	57	23	34
	MX	44	23	21
	Unknown	5	1	4
Venous invasion	No	270	137	133	0.623
	Yes	88	42	46
	NA	55	28	27
Lymphatic invasion	No	229	117	112	0.641
	Yes	144	70	74
	NA	40	20	20
New event	No	327	169	158	0.216
	Yes	86	38	48
Survival status	Alive	328	163	165	0.734
	Dead	85	44	41
New event time		788.87 ± 699.96	797.91 ± 691.95	779.78 ± 709.50	0.721
Survival time		879.14 ± 737.59	876.01 ± 731.45	882.29 ± 762.82	0.383

Notes.

p value refers to the χ² test except new event time and survival time. p value of new event time and survival time refers to the unpaired two-tailed Student’s t-test.

Abbreviations

COAD

colon adenocarcinoma

T

tumor size

N

lymph node status

M

metastasis