PurposeHuman papillomavirus (HPV) DNA screening reduces cervical cancer incidence
and mortality in low-resource settings. Self-collected vaginal samples
tested with affordable HPV tests such as careHPV can
increase the rate of screening in resource-constrained settings. We report
the role of visual inspection with acetic acid (VIA) as a triage test for
women testing positive with the careHPV test on
self-collected vaginal samples.MethodsAs part of a multicountry demonstration study, 5,207 women 30 to 49 years of
age were recruited from urban slums to undergo four cervical screening tests
using the careHPV test on self-collected vaginal samples,
provider-collected cervical samples, the Papanicolaou test, and VIA. All
women who tested positive for any of the screening tests were evaluated with
colposcopy and guided biopsies, followed by treatment if any cervical
lesions were detected. The data from the 377 women who tested positive for
HPV in the self-collected vaginal samples were also analyzed to assess the
performance of VIA, conventional cytology, and colposcopy, as triage tests
in the detection of cervical cancer and precancerous lesions.ResultsNineteen percent of women who tested positive for vaginal HPV (V-HPV) also
tested positive with the VIA test; cervical intraepithelial neoplasia 2+
lesions were detected in 58% of these women. In the 30 % of the women who
tested positive for V-HPV with cytology triage, cervical intraepithelial
neoplasia 2+ lesions were detected in 80% of these women. The colposcopy
referrals for women who tested positive for V-HPV were reduced from 7.6% to
1.5% by VIA triage, and to 2.3% by cytology triage. Although the sensitivity
was reduced, the positive predictive value improved after triage with VIA
and cytology.ConclusionThis study reflects the optimal role of VIA triaging for treatment selection
of lesions among those who test positive for V-HPV in screen and treat
screening programs that use an HPV test in low-resource settings.
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