TABLE 2

P Values for Determination of Prognostic Factors Regarding OS

Parameter	P	HR	95% CI
Age (≥55 vs. <55 y)	<0.001	2.38	1.54–3.68
Sex (male vs. female)	0.16	1.35	0.89–2.06
Karnofsky performance score (<90 vs. ≥90)	0.21	1.72	0.74–4.03
WHO (IV vs. III)	<0.001	2.56	1.61–4.06
MGMT promoter methylation (no vs. yes)	<0.001	2.89	1.83–4.57
Contrast enhancement (yes vs. no)	0.01	2.32	1.23–4.36
Initial treatment (radiotherapy vs. chemotherapy vs. radiochemotherapy)	<0.001	1.87	1.38–2.53
Surgical resection (no vs. yes)	0.90	1.03	0.65–1.63
SUV_max/BG	0.27	1.12	0.92–1.35
SUV_mean/BG	0.42	1.22	0.76–1.96
BTV	0.11	1.01	1.00–1.02
TTP_min (≤12.5 min vs. >12.5 min)	0.001	2.25	1.38–3.67

HR = hazard ratio; CI = confidence interval.
P values were derived from univariate Cox regression for continuous parameters and Log rank test for categoric parameters.