Table 1.

Epidemiological and clinical characteristics of patients.

		Total n = 146
		n	%
Sex	Female	18	12.3
	Male	128	87.7
Age	<50	27	18.5
	50–69	92	63.0
	≥70	27	18.5
Place of residence	Urban	95	65.1
	Rural	51	34.9
Smoking	Yes	103	70.6
	No	43	29.4
Alcohol abuse	Yes	87	59.6
	No	59	40.4
Histological grading	G1	28	19.2
	G2	94	64.4
	G3	24	16.4
T stage	T1	29	19.9
	T2	53	36.3
	T3	27	18.5
	T4	37	25.3
N stage	N1	67	45.8
	N2	33	22.6
	N3	23	15.8
	N4	23	15.8
M stage	M0	146	100.0
	M1	0	0
Location of cancer	Oropharynx	53	36.3
	Larynx	40	27.4
	Oral cavity	53	36.3

T—tumour, dimensions; N—lymph nodes involvement; M—distant metastasis.