Table 1. Baseline characteristics of newly diagnosed GBM patients.

Patient characteristics	n = 90
Age at diagnosis, yr (IQR)	64 (55–70)
Gender
Male (%)	47 (52)
Female (%)	43 (48)
Race
White (%)	75 (97)
Black (%)	2 (3)
Ethnicity
Hispanic (%)	75 (97)
Non-Hispanic (%)	2 (3)
IDH-1 status
WT (%)	84 (93)
Mutated (%)	6 (7)
MGMT promoter
Unmethylated (%)	53 (59)
Methylated (%)	34 (38)
P53 stain, % (IQR)	5 (2–20%)
Ki67, % (IQR)	30 (16–40%)
Preoperative steroid use, n (%)	85 (94)
Median overall survival, mo (95% confidence interval)	15 (12–19)
1-yr survival, n at risk (survival probability)	37 (59%)
2-yr survival, n at risk (survival probability)	12 (26%)

IDH, isocitrate dehydrogenase; IQR, interquartile range; MGMT, O[6]-methylguanine-DNA.