Table 4.

Multivariate analysis of OS and PFS

Analysis of Maximum Likelihood Estimates
Parameter		Parameter Estimate	Standard Error	P	Hazard Ratio	Hazard Ratio 95% CI
OS
Grade	Grade ≤II vs grade ≥III	−2.888	0.845	.0006	0.056	0.011	0.292
Age	<40 vs. ≥40	−2.088	0.775	.007	0.124	0.027	0.566
PFS
Age	<40 vs ≥40	−0.963	0.508	.058	0.382	0.141	1.034
Resection	Biopsy vs GTR	1.977	0.812	.015	7.222	1.47	35.496
	STR vs GTR	0.544	0.440	.217	1.723	0.727	4.084