Table 2.

HPV prevalence distribution in the oral cavity and the oropharynx

	Prevalence (first sampling) n = 94		Probable persistence (12 months later) n = 19*
	HPV positive n (%)	HPV negative n (%)	HPV positive n (%)	HPV negative n (%)
Total prevalence n (%)	44 (46.80)	50 (53.19)	10 (52.62)	9 (47.36)
Anatomical site
Oral cavity only	28 (29.78)	66 (70.21)	3 (15.78)	16 (84.21)
Oropharynx only	4 (4.25)	90 (95.74)	2 (10.52)	17 (89.47)
Both anatomical regions	12 (12.76)	82 (87.23)	5 (26.31)	14 (73.68)

HPV human papillomavirus infection

^*Twenty five subjects were lost during follow-up for different reasons: not located, refused to participate, missed appointment