. Author manuscript; available in PMC: 2016 Aug 24.

Published in final edited form as: Head Neck. 2015 Oct 30;38(Suppl 1):E1192–E1199. doi: 10.1002/hed.24190

TABLE 3.

Dichotomous prognostic predictors of disease-specific survival for patients with extracapsular spread.

Dichotomous covariates	No. of patients	DSS 5-y survival	Univariate analysis p value	Multivariate analysis
Dichotomous covariates	No. of patients	DSS 5-y survival	Univariate analysis p value	HR (95% CI)	p value
Sex
Male	68	22.6%	NS	NA	NA
Female	41	29.3%	NS	NA	NA
Tobacco use
Never	33	22.4%	NS	NA	NA
Ever	76	25.8%	NS	NA	NA
Alcohol use
Never	30	32.0%	NS	NA	NA
Ever	79	20.8%	NS	NA	NA
Perivascular invasion
No	52	17%	NS	NA	NA
Yes	36	25.5%	NS	NA	NA
PNI
No	34	25.1%	NS	NA	NA
Yes	54	17.3%	NS	NA	NA
Muscle invasion
No	101	27.1%	.001	NA	NA
Yes	8	0%	.001	NA	NA
T classification
T1	22	50.8%	.035	NA	NA
T2, T3, or T4	86	19.0%	.035	NA	NA
ECS
Minor	52	49.0%	< .001	3.366 (1.624–6.980)	.001
Major	57	8.5%	< .001	3.366 (1.624–6.980)	.001

Abbreviations: DSS, disease-specific survival; HR, hazard ratio; 95% CI, 95% confidence interval; NS, not significant; NA, not applicable; PNI, perineural invasion; ECS, extracapsular spread.