Table 4.

Prevalence of HPV 6, 11, 16 and 18 infections in CIN 1–3 lesions

Histologic Diagnosis/HPV Type(s)	n (%)
CIN 1
HPV 6	10 (5.2)
HPV 6 and 16	1 (0.5)
HPV 6, 16 and 18	1 (0.5)
HPV 16	30 (15.6)
HPV 16 and 18	1 (0.5)
HPV 18	7 (3.6)
Negative for HPV 6, 11, 16 and 18	142 (74.0)
Total	192 (100.0)
CIN 2
HPV 6	2 (5.6)
HPV 6 and 16	1 (2.8)
HPV 16	12 (33.3)
HPV 18	3 (8.3)
Negative for HPV 6, 11, 16 and 18	18 (50.0)
Total	36 (100.0)
CIN 3
HPV 6	1 (5.9)
HPV 16	10 (58.8)
HPV 16 and 18	1 (5.9)
Negative for HPV 6, 11, 16 and 18	5 (29.4)
Total	17 (100.0)

HPV = human papillomavirus; CIN = cervical intraepithelial neoplasia