TABLE 3.

Significant Predictors of Overall and Progression-Free Survival

Outcome	Predictor	Hazard ratio	95% CI	P value
Overall survival	MGMT methylation	0.15	0.04-0.52	.003
	Dose to the whole brain	1.1/Gy	1.02-1.19	.01
	Age	1.04/yr	1.003-1.07	.03
	Change in processing speed (coding)	0.83	0.73-0.94	.003
	Change processing speed (Trails A)	1.02	1.002-1.03	.03
	Change in verbal learning (HVLT-R Total Recall)	0.80	0.66-0.97	.02
Progression-free survival	MGMT methylation	0.16	0.04-0.59	.006
	Dose to the whole brain	1.07/Gy	1.002-1.14	.04
	Age	1.03/yr	1.000-1.06	.049

Hazard ratios, 95% CIs, and p-values are obtained from univariate Cox regression.