Table 2.

Baseline characteristic of the study group.

Variable	n (%)	P16 gene promoter Methylation specific PCR		p
		(+)	(-)
Age (years)				0.278b
≤55	61 (78.2)	15	46
>55	17 (21.8)	6	11
Sex				0.418a
Male	58 (74.4)	17	41
Female	20 (25.6)	4	16
Body mass index				0.208a
<25	59 (79.6)	18	41
≥25	19 (2.4)	3	6
Smoking				0.937a
Yes	44 (56.4)	12	32
No	34 (43.6)	9	25

^aPearson chi square test.

^bFisher's exact test.