TABLE 1.

Clinical characteristics of samples involved in this study.

Characteristics	TCGA dataset		ICGC dataset
	Training cohort	Testing cohort	Validation cohort
No. of samples	169	168	231
Age at diagnosis, years
≤65	112	106	89
>65	57	62	142
Gender
Female	52	55	61
Male	117	113	170
Grade
G1-2	115	96	NA
G3-4	54	72	NA
TNM-stage
StageI-II	127	123	141
StageIII-IV	42	45	90
T classification
T1-2	128	125	NA
T3-4	41	43	NA