Table 1.

Characteristics of nasopharyngeal carcinoma patients and healthy controls

Characteristics	Patients (n=296)		Controls (n=300)		P value
	N	%	N	%
Gender
Female	136	45.95	148	49.33	0.413
Male	160	54.05	152	50.67
Age (years)
≥60	97	32.77	109	36.33	0.389
<60	199	67.23	191	63.67
Smoking
No	27	9.12	22	7.33	0.458
Yes	269	90.88	278	92.67
Alcohol consumption
No	49	16.55	58	19.33	0.395
Yes	247	83.45	242	80.67
T stage
T1-T2	102	34.46	-
T3-T4	194	65.54
N stage
N0	121	40.88	-
N1/N2/N3	175	59.12
Metastasis
No	52	17.57	-
Yes	244	82.43
Clinical stage
I-II	85	28.72	-
III-IV	211	71.28