Table 1. Patient characteristics.

	OSCC patients	Oral cavity control patients	PSCC patients	Pharyngeal control patients	Total
Number of patients	30	17	19	22	88
Gender
Female	15	10	6	16	47
Male	15	7	14	6	42
Age
Median	61	62	61	36	60
Smoking status
Never smoked	8	6	8	10	32
Former smoker	2	1	2	2	7
Current smoker	18	8	9	10	45
ND	2	2	0		4

Abbreviations: ND=not determined; OSCC=oral squamous cell carcinoma; PSCC=pharyngeal squamous cell carcinoma.