Table 1. Summary of clinical data from the TARGET and GSE21257 osteosarcoma datasets.

	Training set (TARGET n = 84)	Validation set (GSE21257 n = 53)
Age (%)
<18	66(78.6%)	34(64.2%)
≥18	18(21.4%)	19(35.8%)
Gender (%)
Female	37(44.0%)	19(35.8%)
Male	47(56.0%)	34(64.2%)
Metastasis (%)
No	63(75.0%)	19(35.8%)
Yeah	21(35.0%)	34(64.2%)
Survival (%)
Alive	57(67.9%)	30(62.3%)
Dead	27(32.1%)	23(37.7%)