Table 4. Summary of clinical covariates for TCGA and the internal (MD Anderson) data cohort. Additionally, p-values comparing the distributions of these clinical variables between the two cohorts are shown below (p-values are not significant, suggesting that the TCGA and internal cohorts are comparable).

	TCGA GBM cohort (mean + std. dev)	IHC data cohort (MD Anderson Cancer Center) (mean +std. dev)	p-values
Age	56.84 + 14.96	57.96 + 13.78	0.638
Gender	F – 26; M – 53	F – 33; M – 36	0.105
Karnofsky Performance Score (KPS)	81.01 + 11.86	84.64 + 14.4	0.102
FLAIR tumor volume (in mm3)	130761.35 + 74839.78	142820.01 + 89254.72	0.381
T1 tumor volume (in mm3)	51677.66 + 32966.17	52738.99 + 38800.02	0.86
Number of Subjects	79	69