Table 1.

Clinical information of the patients in the test and training groups.

Characteristics	Train cohort (n = 265)		Test cohort (n = 264)		Entire cohort (n = 529)
	n	%	n	%	n	%
Age
≤65	172	64.91	176	66.67	348	65.78
>65	93	35.09	88	33.33	181	34.22
Status
Alive	174	65.66	182	68.94	356	67.3
Dead	91	34.34	82	31.06	173	32.7
Gender
Female	94	35.47	91	34.47	185	34.97
Male	171	64.53	173	65.53	344	65.03
Stage
Stage I	130	49.06	133	50.38	263	49.72
Stage II	28	10.57	29	10.98	57	10.78
Stage III	60	22.64	63	23.86	123	23.25
Stage IV	46	17.35	37	14.02	83	15.68
Unknow	1	0.38	2	0.76	3	0.57
T stage
T1	133	50.19	136	51.52	269	50.85
T2	34	12.83	35	13.26	69	13.04
T3	92	34.72	88	33.33	180	34.03
T4	6	2.26	5	1.89	11	2.08
M stage
M0	202	76.23	218	82.58	420	79.4
M1	46	17.36	33	12.5	79	14.93
Unknow	17	6.41	13	4.92	30	5.67
N stage
N0	116	43.77	123	46.59	239	45.18
N1	4	1.51	12	4.55	16	3.02
Unknow	145	54.72	129	48.86	274	51.8
Race
White	229	86.42	231	87.5	460	86.96
Black or African American	28	10.57	26	9.85	54	10.21
Asian	5	1.89	3	1.14	8	1.51
Unknow	3	1.12	4	1.51	7	1.32

Abbreviations: T stage: Tumor stage; N stage: Node stage; M stage: metastasis stage.