Table 1. Clinical characteristics.

TCGA		GEO
Variables	Number of samples	Variables	Number of samples
Gender		Gender
Male/Female	102/83	Male/Female	Unknown
Age at diagnosis		Age at diagnosis
≤65/>65	96/89	≤65/>65	Unknown
Grade		Grade
G1/G2/G3/G4/NA	32/97/51/2/3	G1/G2/G3/G4/NA	3/64/59/2/2
Stage		Stage
I/II/III/IV/NA	21/152/4/5/3	I/II/III/IV/NA	7/84/26/13/6
T		T
T1/T2/T3/T4/NA	7/24/148/4/2	T1/T2/T3/T4	Unknown
M		M
M0/M1/NA	85/5/95	M0/M1/NA	Unknown
N		N
N0/N1/N2	80/130/5	N0/N1/N2/N3	Unknown