Table 4.

Univariate and multivariate analysis of prognostic parameters of total OS in TCGA database

	Single Factor Analysis		Multi-Factor Analysis
	95% CI	P	95% CI	P
NDRG1	1.306 (1.150-1.483)	3.78E-05	1.140 (1.011-1.286)	0.0328
WHO grading system	5.887 (4.106-8.440)	5.22E-22	4.084 (2.802-5.951)	2.41E-13
Age	4.307 (3.120-5.946)	6.98E-19	3.901 (2.713-5.608)	2.01E-13
Primary/Recurrent Status	1.469 (0.929-2.324)	0.1
MGMT	0.293 (0.222-0.385)	1.4E-18	0.350 (0.263-0.467)	7.46E-13