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Int J Cancer. 2016 Jun 15;138(12):2922-31. doi: 10.1002/ijc.30030. Epub 2016 Feb 26.

Use of HPV testing for cervical screening in vaccinated women--Insights from the SHEVa (Scottish HPV Prevalence in Vaccinated Women) study.

Author information

1
HPV Research Group, University of Edinburgh, Edinburgh, United Kingdom.
2
Department of Mathematics and Statistics, Strathclyde University, Glasgow, United Kingdom.
3
Global Health Academy, University of Edinburgh, Edinburgh, United Kingdom.
4
Liverpool Clinical Laboratories, Royal Liverpool University Hospital, Liverpool, United Kingdom.
5
Health Protection Scotland, Glasgow, United Kingdom.
6
Department of Pathology, University of Edinburgh, Edinburgh, United Kingdom.
7
Scottish HPV Reference Laboratory, Royal Infirmary of Edinburgh, NHS Lothian, Edinburgh, United Kingdom.

Abstract

The management of cervical disease is changing worldwide as a result of HPV vaccination and the increasing use of HPV testing for cervical screening. However, the impact of vaccination on the performance of HPV based screening strategies is unknown. The SHEVa (Scottish HPV Prevalence in Vaccinated women) projects are designed to gain insight into the impact of vaccination on the performance of clinically validated HPV assays. Samples collated from women attending for first cervical smear who had been vaccinated as part of a national "catch-up" programme were tested with three clinically validated HPV assays (2 DNA and 1 RNA). Overall HR-HPV and type specific positivity was assessed in total population and according to underlying cytology and compared to a demographically equivalent group of unvaccinated women. HPV prevalence was significantly lower in vaccinated women and was influenced by assay-type, reducing by 23-25% for the DNA based assays and 32% for the RNA assay (p = 0.0008). All assays showed over 75% reduction of HPV16 and/or 18 (p < 0.0001) whereas the prevalence of non 16/18 HR-HPV was not significantly different in vaccinated vs unvaccinated women. In women with low grade abnormalities, the proportion associated with non 16/18 HR-HPV was significantly higher in vaccinated women (p < 0.0001). Clinically validated HPV assays are affected differentially when applied to vaccinated women, dependent on assay chemistry. The increased proportion of non HPV16/18 infections may have implications for clinical performance, consequently, longitudinal studies linking HPV status to disease outcomes in vaccinated women are warranted.

KEYWORDS:

HPV; HPV immunisation; cervical screening; clinically validated HPV tests

PMID:
26845632
DOI:
10.1002/ijc.30030
[Indexed for MEDLINE]
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