TABLE 4.

Subgroup analyses of impacts of IDH mutations on patient outcomes in different chondrosarcoma grades

Tumor grades	Hazard Ratio (95% CI)	p‐value
Low‐grade
RFS	NA	NA
MFS	NA	NA
OS	NA	NA
High‐grade
RFS	0.41 (95% CI = 0.17–1.03)	0.06
MFS	1.55 (95% CI = 0.57–4.24)	0.39
OS	1.21 (95% CI = 0.53–2.79)	0.65
Dedifferentiated
RFS	1.54 (95% CI = 0.25–9.27)	0.64
MFS	1.35 (95% CI = 0.54–3.34)	0.52
OS	1.63 (95% CI = 0.89–3.01)	0.12

Abbreviations: CI, confidence interval; MFS, metastasis‐free survival; NA, not available; OS, overall survival; RFS, recurrence‐free survival.