Table 2.

Clinicopathology characteristics of patients with COAD.

Covariates		Training set	Test set	P-value
Age	<=65	81(41.75%)	57(44.19%)	0.7503
	>65	113(58.25%)	72(55.81%)
Gender	FEMALE	95(48.97%)	61(47.29%)	0.8551
	MALE	99(51.03%)	68(52.71%)
Stage	I-II	110(56.7%)	66(51.16%)	0.5004
	III-IV	79(40.72%)	57(44.19%)
	unknow	5(2.58%)	6(4.65%)
T	T1-2	34(17.53%)	30(23.26%)	0.2615
	T3-4	160(82.47%)	99(76.74%)
M	M0	136(70.1%)	91(70.54%)	0.1279
	M1	37(19.07%)	14(10.85%)
	unknow	21(10.82%)	24(18.6%)
N	N0	116(59.79%)	72(55.81%)	0.5518
	N1-3	78(40.21%)	57(44.19%)