Table 3.

Detailed information about the GSE21257, the GSE99671, and the TARGET-OS data sets.

	TARGET-OS	GSE21257	GSE99671
Osteosarcoma samples	88	53	36
Male	50	34	22
Female	37	19	14
Research object	Human	Human	Human
Time of uploading chip	Aug 17,2019	Mar 22,2012	Nov 03, 2017
Median ages (IQR)	14.5(12.2–17.4)	16.7(13.6–18.7)	NA

IQR: interquartile range, NA: not applicable.