Table 2. Variables related to OS in GBMs undergoing TMZ/RT: Univariate and multivariate Cox analyses.

Variable (n = 229)	OS
	Univariate Cox analysis	Multivariate Cox analysis
	P value	Hazard ratio	95% CI		P value
			Lower	Upper
Age	0.001	1.019	1.002	1.036	0.03
Preoperative KPS	<0.001	0.969	0.956	0.983	<0.001
IDH1 mutation	<0.001	0.444	0.227	0.869	0.018
MGMT methylation	<0.001	0.594	0.371	0.949	0.03