Published 13 October 2008, doi:10.1136/bmj.a1754
Cite this as: BMJ 2008;337:a1754

Research

Long term predictive values of cytology and human papillomavirus testing in cervical cancer screening: joint European cohort study

¹ Lund University, Medical Microbiology, University Hospital MAS, 205 02 Malmö, Sweden, ² Department of Public Health, Erasmus MC, PO Box 2040, 3000 CA Rotterdam, Netherlands, ³ CHU Reims, Service d’Anatomie Pathologique, INSERM UMR-S 903, Laboratoire Pol Bouin, Reims, France, ⁴ Department of Obstetrics and Gynaecology, Teaching Hospital Wolfsburg, Germany, ⁵ Cancer Research UK, Wolfson Institute of Preventive Medicine, London, ⁶ Institute of Cancer Epidemiology, Danish Cancer Society, DK-2100, Copenhagen, Denmark, ⁷ Catalan Institute of Oncology, Hospital Duran i Reynals, Barcelona, Spain, ⁸ Gynecologic Clinic, Rigshospitalet, Copenhagen University Hospital, Denmark, ⁹ CIBER Epidemiologia y Salud Pública (CIBERESP), Spain, ¹⁰ Section of Experimental Virology, Institute of Medical Virology, University Hospital of Tübingen, Germany

Objective To obtain large scale and generalisable data on the long term predictive value of cytology and human papillomavirus (HPV) testing for development of cervical intraepithelial neoplasia grade 3 or cancer (CIN3+).

Design Multinational cohort study with joint database analysis.

Setting Seven primary HPV screening studies in six European countries.

Participants 24 295 women attending cervical screening enrolled into HPV screening trials who had at least one cervical cytology or histopathology examination during follow-up.

Main outcome measure Long term cumulative incidence of CIN3+.

Results The cumulative incidence rate of CIN3+ after six years was considerably lower among women negative for HPV at baseline (0.27%, 95% confidence interval 0.12% to 0.45%) than among women with negative results on cytology (0.97%, 0.53% to 1.34%)). By comparison, the cumulative incidence rate for women with negative cytology results at the most commonly recommended screening interval in Europe (three years) was 0.51% (0.23% to 0.77%). The cumulative incidence rate among women with negative cytology results who were positive for HPV increased continuously over time, reaching 10% at six years, whereas the rate among women with positive cytology results who were negative for HPV remained below 3%.

Conclusions A consistently low six year cumulative incidence rate of CIN3+ among women negative for HPV suggests that cervical screening strategies in which women are screened for HPV every six years are safe and effective.

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