Table 3. . Multivariate analyses of factors affecting survival.

Variable	HR	95% CI	p-value
Age ≥60 years	0.931	0.581–1.491	0.765
Age <60 years	1.075	0.671–1.722	0.766
Methylation status	0.453	0.279–0.735	0.001
ECOG ≤2	0.649	0.403–1.046	0.083
ECOG >2	1.540	0.956–2.482	0.076
Race (white)	1.56	0.88–2.74	0.126
Race (black)	0.571	0.273–1.198	0.138
Extent of surgical resection
Total	0.083	0.01–0.665	0.019
Partial	0.142	0.017–1.167	0.069
Biopsy	0.159	0.018–1.443	0.102

p-values in bold are significant.

ECOG: Eastern Cooperative Oncology Group; HR: Hazard ratio.