Is it rational to start population-based cervical cancer screening at or soon after age 20? Analysis of time trends in preinvasive and invasive diseases

Eur J Cancer. 2007 Mar;43(4):769-74. doi: 10.1016/j.ejca.2006.11.017. Epub 2007 Jan 22.

Abstract

The effect of starting screening at age 20 in 1988 was assessed by analysing (a) the age-specific incidence and distribution of stage and histology of invasive diseases, and (b) the detection rates of histologic moderate to high-grade intraepithelial neoplasia (CIN 2-3/AIS), and 1st abnormal cytology and repeat low-grade cytology after follow-up observation. Cancer incidence increased significantly at age 25-34 after 1979 due to early stage squamous cell and adenocarcinoma. After an initial increased rate of preinvasive disease, CIN 3 decreased significantly at age 30-34 after 1988, at age 25-29 after 1993, and levelled out after 1998 at age 20-24. The rates of CIN 2 levelled out after 1998. The rates of repeat low-grade smears decreased after observation at age 20-24 by 80%. The study confirms an increasing rate of preinvasive and invasive disease among younger women and indicates the benefit of starting organised screening at 2-3 year intervals soon after age 20.

MeSH terms

  • Adult
  • Age Factors
  • Aged
  • Cervical Intraepithelial Neoplasia / pathology
  • Cervical Intraepithelial Neoplasia / prevention & control*
  • Cytological Techniques / standards
  • Female
  • Humans
  • Iceland / epidemiology
  • Incidence
  • Mass Screening / organization & administration*
  • Middle Aged
  • Patient Acceptance of Health Care / statistics & numerical data
  • Time Factors
  • Uterine Cervical Neoplasms / pathology
  • Uterine Cervical Neoplasms / prevention & control*
  • Vaginal Smears / standards