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Susanne K Kjaer a Danish Cancer Society, Institute of Cancer
Epidemiology, DK-2100 Copenhagen, Denmark, b Department of Pathology, Section of Molecular Pathology,
University Hospital Vrije Universiteit, Amsterdam, Netherlands, c Department of Pathology and Laboratory Medicine,
Emory University, Atlanta, GA, USA, d Department of Pathology,
Johns Hopkins Medical Institutions, Baltimore, MD, USA, e Department of Gynecology,
Rigshospitalet, Copenhagen, Denmark, f Department of Pathology,
Nykøbing Falster Hospital, Nykøbing Falster, Denmark
Correspondence to: S K
Kjær susanne{at}cancer.dk
Objectives:
To investigate the role of human
papillomavirus (HPV) in the development of cervical neoplasia in women
with no previous cervical cytological abnormalities; whether the
presence of virus DNA predicts development of squamous intraepithelial lesion; and whether the risk of incident squamous intraepithelial lesions differs with repeated detection of the same HPV type versus repeated detection of different types.
What is already known on this topic
Previous studies have included only a few cases of high grade squamous
intraepithelial lesions, and few have randomly sampled women from the
general population What this study adds
Persistent HPV infection with a specific HPV type was an indicator of
incident high grade lesions among young women in the general
population The association between persistence and high grade cervical lesions was
more pronounced among women aged over 25
Design:
Population based prospective cohort study.
Setting:
General population in Copenhagen, Denmark.
Participants:
10 758 women aged 20-29 years followed
up for development of cervical cytological abnormalities; 370 incident cases were detected (40 with atypical squamous cells of undetermined significance, 165 with low grade squamous intraepithelial lesions, 165 with high grade squamous intraepithelial lesions).
Main outcome measures:
Results of cervical smear
tests and cervical swabs at enrolment and at the second examination
about two years later.
Results:
Compared with women who were negative for human papillomavirus at enrolment, those with positive results had a
significantly increased risk at follow up of having atypical cells
(odds ratio 3.2, 95% confidence interval 1.3 to 7.9), low grade
lesions (7.5, 4.8 to 11.7), or high grade lesions (25.8, 15.3 to 43.6).
Similarly, women who were positive for HPV at the second examination
had a strongly increased risk of low (34.3, 17.6 to 67.0) and high
grade lesions (60.7, 25.5 to 144.0). For high grade lesions the risk
was strongly increased if the same virus type was present at both
examinations (813.0, 168.2 to 3229.2).
Conclusions:
Infection with human papillomavirus
precedes the development of low and high grade squamous intraepithelial lesions. For high grade lesions the risk is greatest in women positive
for the same type of HPV on repeated testing.
Persistence of infection with human papillomavirus (HPV) is thought to
have a role in the development of cervical neoplasia
In women aged 20-29, HPV infection preceded the development of high
grade lesions
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