Table 3.

Baseline characteristics of the patients in different risk groups.

Characteristics	TCGA cohort			ICGC cohort
	High risk	Low risk	P value	High risk	Low risk	P value
Age			0.8604			0.0223
<65	103	102		55	27
≥65	68	70		120	29
Gender			<0.0001			0.4411
Female	52	58		44	17
Male	119	114		131	39
Vital status			<0.0001			0.0960
Alive	92	128		139	50
Dead	79	44		36	6
Grade			0.0152*
I/II	95	119
III/IV	74	50
Unknown	2	3
Stage			0.1273			0.3749
I/II	110	128		104	37
III/IV	48	35		71	19
Unknown	13	9		0	0
T stage			0.0402*
T1/T2	120	132
T3/T4	51	37
Unknown	0	3
M stage			0.8220*
M0	124	121
M1	1	2
Unknown	46	49
N stage			1.0000*
N0	119	120
N1	2	1
Unknown	50	51

*Fisher’s test.