Table 2. Cox proportional hazards regression model analysis of overall survival in CGGA Part B.

Variable	Univariate analysis			Multivariate analysis
	Wald	P		Wald	P
Risk_score	19.623	<0.001		13.265	<0.001
Gender (Male vs Female)	0.213	0.645
Age	0.734	0.391
Grade (II vs III)	37.623	<0.001		38.283	<0.001
Histology	34.323	<0.001		0.308	0.579
IDH1_mutant (Yes vs No)	19.332	<0.001		0.020	0.889
1p19q_codeletion_status (Yes vs No)	27.873	<0.001		0.391	0.532
Radiotherapy (Yes vs No)	3.007	0.083		0.047	0.829
Chemotherapy (Yes vs No)	0.480	0.488
MGMT	1.607	0.205