High-grade cervical intraepithelial neoplasia in human papillomavirus self-sampling of screening non-attenders

Br J Cancer. 2018 Jan;118(1):138-144. doi: 10.1038/bjc.2017.371. Epub 2017 Nov 14.

Abstract

Background: Self-sampling for human papillomavirus (HPV) offered to women who do not participate in cervical cancer screening is an increasingly popular method to increase screening coverage. The rationale behind self-sampling is that unscreened women harbour a high proportion of undetected precancer lesions. Here, we compare the cervical intraepithelial neoplasia grade 2 or worse (⩾CIN2) detection rate between non-attenders who participated in self-sampling and women attending routine screening.

Methods: A total of 23 632 women who were qualified as non-attenders in the Copenhagen Region were invited for HPV-based self-sampling. Of these, 4824 women returned a self-sample, and HPV-positive women were referred for cytology and HPV co-testing as follow-up. The entire cohort and a reference cohort (3347 routinely screened women) were followed for histopathology confirmed ⩾CIN2. Odds ratio (OR) and the relative positive predictive value of ⩾CIN2 detection between the two populations were estimated.

Results: Women participating in self-sampling had a higher ⩾CIN2 detection than women undergoing routine cytology-based screening (OR=1.83, 95% CI: 1.21-2.77) and a similar detection as routinely screened women tested with cytology and HPV testing (OR=1.03, 95% CI: 0.75-1.40). The positive predictive value for ⩾CIN2 was higher in screening non-attenders than in routinely HPV- and cytology-screened screened women (36.5% vs 25.6%, respectively).

Conclusions: Self-sampling offered to non-attenders showed higher detection rates for ⩾CIN2 than routine cytology-based screening, and similar detection rates as HPV and cytology co-testing. This reinforces the importance of self-sampling for screening non-attenders in organised cervical cancer screening.

Publication types

  • Comparative Study
  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Cervical Intraepithelial Neoplasia / pathology*
  • Cervical Intraepithelial Neoplasia / virology
  • Cohort Studies
  • Diagnostic Self Evaluation
  • Diagnostic Tests, Routine
  • Early Detection of Cancer
  • Female
  • Humans
  • Middle Aged
  • Neoplasm Grading
  • Odds Ratio
  • Papillomavirus Infections / complications
  • Papillomavirus Infections / diagnosis*
  • Specimen Handling / methods*
  • Uterine Cervical Neoplasms / pathology*
  • Uterine Cervical Neoplasms / virology