TABLE 1.

Clinicopathological characteristics of osteosarcoma patients in high- and low-risk groups.

Clinical characteristics	TCGA cohort		GSE21257 cohort
	Low risk	High risk	Low risk	High risk
No. of patients	44	42	27	26
Age (median)	14	14	16	16
Gender (%)
Female	20 (45.5)	17 (40.5)	8 (29.6)	11 (42.3)
Male	24 (54.5)	25 (59.5)	19 (70.4)	15 (57.7)
Survival status
OS days (median)	1729	719	2,342	974
Censored (%)	5 (11.2)	24 (57.1)	8 (29.6)	15 (57.7)

TCGA, The Cancer Genome Atlas; OS, overall survival.