Table 1.

Patient characteristics.

Variable				Survivors		Deceased		p-Value
		No	(%)	No	(%)	No	(%)
		90			70	20
Age, years (Mean ± SD)		63.34 ± 12.03
Sex								0.5449
	Male	70	77.78	53	75.71%	17	85%
	Female	20	22.22	17	24.29%	3	15%
T stage								0.0009
	T1	18	20.00	17	24.29%	1	5%
	T2	40	44.44	34	48.57%	6	30%
	T3	17	18.89	13	18.57%	4	20%
	T4	15	16.67	6	8.57%	9	45%
Nodal status		47	52.22					0.0809
	pN0	21	44.68	19	27.14%	2	10%
	pN+	26	55.32	17	24.29%	9	45%
TNM stage								<0.0001
	I	16	17.78	16	22.86%	0	0%
	II	28	31.11	27	38.57%	1	5%
	III	18	20.00	13	18.57%	5	25%
	IVA	28	31.11	14	20%	14	70%
Location								0.0427
	Oral	54	60.00	38	54.29%	16	80%
	Lip	36	40.00	32	45.71%	4	20%
Smoking								0.0774
	Smokers	58	64.44	41	58.57%	17	85%
	Nonsmokers	26	28.89	23	32.86%	3	15%
	Missing	6	6.67	6	8.57%	0	0%
Alcohol consumption								0.0895
	Drinkers	45	50.00	31	44.29%	14	70%
	Nondrinkers	39	43.33	33	47.14%	6	30%
	Missing	6	6.67	6	8.57%	0	0%
Histological differentiation								0.2716
	High	19	21.11	17	24.29%	2	10%
	Intermediate	56	62.22	43	61.43%	13	65%
	Low	15	16.67	10	14.29%	5	25%
Perineural invasion								0.1534
	Confirmed	13	14.44	8	11.43%	5	25%
	Not confirmed	77	85.56	62	88.57%	15	75%
Vascular invasion								0.6112
	Present	6	6.67	4	5.71%	2	10%
	Absent	84	93.33	66	94.29%	18	90%
Resection margins								0.0039
	Positive	12	13.33	5	7.14%	7	35%
	Negative	78	86.67	65	92.86%	13	65%
Locoregional recurrence								<0.0001
	Present	26	28.89	6	8.57%	20	100%
	Absent	64	71.11	64	91.43%	0	0%

Statistical significance <0.05.