Table 1.

Patient demographics and characteristics.

Variables	Categories	OPC (N = 121)
		No.	%
Age (Years)	≤55	31	25.6
	>55	90	74.4
Sex	Male	110	90.9
	Female	11	9.1
Smoking Status	Ever	89	73.6
	Never	31	25.6
	Unknown	1	0.8
Drinking Status	Ever	59	48.8
	Never	61	50.4
	Unknown	1	0.8
Anatomical Site	Tonsil	60	49.6
	Base of Tongue	37	30.6
	Both	8	6.6
	Others	16	13.2
p161INK4a Status	Positive	89	73.6
	Negative	32	26.4
Salivary HPV-16 DNA Status	Positive	74	61.2
	Negative	47	38.8