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P3.332 Matching Participants in a Chlamydia Screening Programme with Patients Seen by STD Clinic, General Practitioner, or Specialist: Added Value of a Chlamydia Screening Programme
  1. G A F S van Liere1,2,
  2. N H T M Dukers-Muijrers1,2,
  3. J E A M van Bergen3,4,
  4. I V F van den Broek5,
  5. H M Götz6,
  6. J S A Fennema7,
  7. F S Stals8,
  8. C J P A Hoebe1,2
  1. 1Department of Sexual Health, Infectious Diseases and Environmental Health, Public Health Service South Limburg, Geleen, The Netherlands
  2. 2Department of Medical Microbiology, Maastricht University Medical Center, Maastricht, The Netherlands
  3. 3STI AIDS The Netherlands, Amsterdam, The Netherlands
  4. 4Department of General Practice, Academic Medical Centre-University of Amsterdam, Amsterdam, The Netherlands
  5. 5Epidemiology and Surveillance Unit, Centre for Infectious Disease Control, National Institute of Public Health and the Environment, Bilthoven, The Netherlands
  6. 6Department of Infectious Disease Control, Rotterdam Rijnmond Public Health Service, Rotterdam, The Netherlands
  7. 7Cluster of Infectious Diseases, Department of Research, Online Research and Prevention Unit, Amsterdam Health Service, Amsterdam, The Netherlands
  8. 8Department of Medical Microbiology, Atrium Medical Centre, Heerlen, The Netherlands


Background Register and internet-based Chlamydia Screening Implementation (CSI) was introduced in the Netherlands to detect and treat asymptomatic infections and to limit ongoing transmission through annual testing and treatment of Chlamydia trachomatis (Ct) in young people. This population-based screening may be compromised by addressing individuals who are already covered by regular care like general practitioners and STD clinics. We study, in a timeframe of five years, overlap between CSI participation and attendance of major services offering Ct screening services to assess whether CSI reached additional patients.

Methods Data included all Ct tests performed in subjects aged 16–29 years in Eastern South Limburg in the Netherlands (population 16–29 years: 42,000) between 2006 and 2010 by CSI, regional STD clinic, general practitioners (GPs), and specialists (mainly gynaecologists) as reported by the testing laboratory. Data were matched between testing agencies, with complete certainty (STD clinic) (name, date of birth) and with a certainty range (part of the name, month and year of birth). Maastricht University’s ethical committee approved the study. Analyses were restricted to subjects tested (at least) by CSI.

Results In CSI, 4477 (82.9%) subjects were first-time testers, others were previously tested by the STD clinic (3.5%, n = 190), GPs (6.4%, n = 352), specialists (3.6%, n = 197) or multiple providers (3.4%, n = 183). Compared to persons previously tested by the STD clinic/GPs/specialists, first time testers were younger (mean age 23y vs. 24y, p < 0.001), and more often were heterosexual men compared to women (29.8% vs. 13.6%, p < 0.001). Ct prevalence was similar in first time testers (4.6%) compared to previously tested persons (4.9%, p = 0.76). Symptom-rate was also similar (2.5% vs. 3.3% p = 0.32).

Conclusions Chlamydia screening addresses young individuals, including heterosexual men, hidden to current care with similar Ct prevalence and adds to the existing regular care.

  • chlamydia screening
  • general practitioner
  • STD Clinic

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