Table 1.

Baseline characteristics of patients from TCGA and GEO database

Clinical feature	Total patients (n = 803)		TCGA (n = 377)		GSE21501 (n = 426)
	Number	%	Number	%	Number	%
Age
≤ 65 y	456	56.79	176	46.68	280	65.73
> 65 y	347	43.21	201	53.32	146	34.27
Sex
Female	265	33.00	130	34.48	135	31.69
Male	538	67.00	247	65.52	291	68.31
Follow-up status
Alive	451	56.16	227	60.21	224	55.58
Dead	352	43.84	150	39.79	202	47.42
Grade
1–2	135	16.81	135	35.81	0	0
3	242	30.14	242	64.19	0	0
Unknown	426	53.05	0	0	426	100
Stage T
1–2	147	18.31	98	25.99	49	11.50
3–4	656	81.69	279	74.01	377	88.50
Stage N
N0	196	24.41	116	30.77	80	18.78
N1–3	607	75.59	261	69.23	346	81.22