Table 2.

Effects of pre-treatment and treatment variables in univariable Cox proportional hazard models.

Variable/model	Univariate model
	HR [95% CI]	P value
Site (axial)	3.07 [1.44–6.52]	0.0022
Size (large)	3.8 [1.46–9.9]	0.0034
Metastasis (yes)	4.1 [1.99–8.43]	<0.001
Radiation (yes)	1.53 [0.76–3.11]	0.23
Surgical margins (positive)	3.3 [1.04–10.43]	0.031

HR (hazard ratio); 95% CI (95% confidence interval).