Table 3. The results of the multivariate analysis of prognostic factors influencing overall and progression free survival after surgical resection.

Variable	Hazard ratio	95% CI	P value
Overall survival
N factor	4.974	1.259 to 19.65	0.02209
V factor	3.791	0.4165 to 34.51	0.237
Progression free survival
Tissue type of epithelial component	6.281	1.185 to 33.28	0.03080
V factor	2.271	0.2426 to 21.26	0.4723
N factor	4.608	1.1010 to 19.29	0.03649