High-risk HPV infection after five years in a population-based cohort of Chilean women

Table 3 High-risk HPV status after 5 years in a cohort of 576 women - Santiago, Chile

Age in 2001 years	Number of women	Prevalence		Incidence	Persistence
		2001 n (%)	2006 n (%)	n (%)	any type		type-specific
					n (%)	% of cohort	n (%)	% of cohort
≤ 20	36	5 (13.9)	7 (19.4)	7 (19.4)	0 (0.0)	0.0	0 (0.0)	0.0
21 - 30	84	8 (9.5)	12 (14.3)	12 (14.3)	2 (25.0)	2.4	0 (0.0)	0.0
31 - 40	112	9 (8.0)	9 (8.0)*	7 (6.2)	4 (44.4)	3.6	3 (33.3)	2.7
41 - 50	157	9 (5.7)	21 (13.4)	17 (10.8)	6 (66.7)	3.8	4 (44.4)	2.5
51 - 60	111	12 (10.8)	14 (12.6)*	11 (9.9)	7 (58.3)	6.3	5 (41.7)	4.5
61 - 70	58	5 (8.6)	7 (12.1)*	5 (8.6)	5 (100)	8.6	3 (60.0)	5.2
> 70	18	3 (16.7)	3 (16.7)	0 (0.0)	3 (100)	16.7	3 (100)	16.7
All	576	51 (8.9)	73 (12.7)*	59 (10.2)	27 (52.9)	4.7	18 (35.3)	3.1

Prevalence: women testing positive for one or more high-risk HPV genotypes in a given year.
Incidence: women with one or more newly detected high-risk HPV genotypes in 2006.
Persistence, any type: women testing positive for one or more high-risk HPV genotypes in both 2001 and 2006, regardless of genotype.
Persistence, type-specific: women testing positive for the same high-risk HPV genotype(s) in both 2001 and 2006.
* The number of incident cases plus the number of type-specific persistent cases does not equal the number of prevalent cases because some women have both a persistent high-risk HPV genotype and a newly detected one.

ISSN: 1750-9378