title: Which women should be tested for Chlamydia trachomatis?
abstract: OBJECTIVE
  To assess the prevalence of genitourinary Chlamydia trachomatis infection among women in different clinical settings, with a view to making decisions about who should be tested routinely.
  
  
  METHODS
  Cross sectional study.
  
  
  METHODS
  One regional hospital and family planning clinic serving an urban centre. Population Two thousand thirty-five sexually active women attending various outpatient settings.
  
  
  METHODS
  Prevalence of positivity by clinical setting, stratified by age.
  
  
  RESULTS
  Overall, prevalence of lower genital tract chlamydial infection was similar in a variety of clinical settings. Infertile women were the only exception, demonstrating a much lower prevalence. Stratifying the study population by age found a clear trend towards high prevalence in teenagers and virtually no infection in women over the age of 30 years.
  
  
  CONCLUSIONS
  The prevalence of chlamydial infection in women is related to age, regardless of clinical presentation. In practice, opportunistic screening should target sexually active women under 30 years of age.
authors.affiliation: Department of Obstetrics and Gynaecology, University of Aberdeen, UK.
authors.forename: S
authors.initials: S
authors.lastname: Macmillan
authors.forename: H
authors.initials: H
authors.lastname: McKenzie
authors.forename: G
authors.initials: G
authors.lastname: Flett
authors.forename: A
authors.initials: A
authors.lastname: Templeton
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D000553:Ambulatory Care; D002690:Chlamydia Infections / Q000175:diagnosis / Q000453:epidemiology*; D002692:Chlamydia trachomatis / Q000302:isolation & purification*; D003430:Cross-Sectional Studies; D003657:Decision Making; D005260:Female; D006801:Humans; D008403:Mass Screening / Q000379:methods; D008875:Middle Aged; D011247:Pregnancy; D011251:Pregnancy Complications, Infectious / Q000453:epidemiology; D015995:Prevalence; D012606:Scotland / Q000453:epidemiology