Table 3.

Multivariate Analysis of pN0/PNI+ v pN0/PNI− for Overall Survival, Disesae-specific survival, local regional control and disease free interval.

	Variable	Standard Error	Wald chi-squared	p-Value	Hazard Ratio	beta-coefficient	95% Hazard Ratio Confidence Interval
Overall Survival	Perineural Invasion	0.40	2.84	0.092	1.97	0.34	0.84	4.35
Disease Specific Survival	Perineural Invasion	0.54	3.30	0.069	2.69	0.34	0.925	7.80
	Tumor Grade (Poor vs. Well)	0.92000	4.620	0.032	7.225	1.23	1.191	43.848
Disease Free Interval	Perineural Invasion	0.49	6.26	0.012	3.37	0.53	1.30	8.72
	Radiation	<0.001	2.56	0.11	1.00	0.0	1.00	1.002
Local-Regional Control	Perineural Invasion	0.53	9.65	0.002	5.18	0.66	1.83	14.6
	Perivascular Invasion	0.64	4.36	0.037	3.83	0.79	1.09	13.5
	Radiation	0.001	4.14	0.042	1.001	0.0	1.00	1.002