Pretreatment Prediction of Relapse Risk in Patients with Osteosarcoma Using Radiomics Nomogram Based on CT: A Retrospective Multicenter Study

Table 3

Relapse rate in high-risk and low-risk groups.

Parameter	Training cohort		Validation cohort
	High-risk group	Low-risk group	High-risk group	Low-risk group
No. of patients	32	31	9	8
No. of patients with relapse	21	6	5	0
Rate of patients with relapse	66%	19%	56%	0%