Table 2.

Tabulated multivariable Cox proportional hazards analysis for mortality in patients with mesenchymal chondrosarcoma*

Variable	Hazard ratio	95% CI	p value
Age at diagnosis	–	–	0.81
Metastasis	12.38	5.75–26.65	<0.001
Gender: male	1.37	0.73–2.57	0.33
Location	–	–	0.002
Site: skeletal	1.91	0.96–3.79	0.06
Size (10-mm increase)	1.16	1.09–1.23	<0.001
Age*location	–	–	<0.001

* Variables found significant in univariable log-rank test were included; reference levels include gender = female; site = extraskeletal; and location = appendicular; appropriate hazard ratios for the age*location interaction are specified in Table 3; main effects of variables included in the interaction are not interpretable and therefore not provided; CI = confidence interval.