IDH1 and glioblastoma: IDH-mutant patients had a mean age of 46.9 years (95% CI: 36.8–56.9), median 48.5 [IQR: 33.8–58.8]; IDHwt GBM had a mean of 60.4 (95% CI: 57.0–64.0), median 61.0 [IQR: 53.0–68.0] (p < 0.006).