title: Chlamydia trachomatis testing among 13-25-year-olds in non-genitourinary medicine settings.
abstract: OBJECTIVE
  In this paper we examine Chlamydia trachomatis testing in settings other than genitourinary medicine (GUM) clinics, focusing on the factors associated with chlamydial infection and with postal testing.
  
  
  METHODS
  Analysis of tests collected from young people aged 13-25 years (n = 4475) between May 2001 and June 2004 via postal testing kits, at a local sexual health clinic, and at further education colleges in Lothian, Scotland.
  
  
  RESULTS
  84.8% of the testers were female and 15.2% were male. 84 men (12.3%, 95% CI 10.1-15.0) and 403 women (10.6%, 95% CI 9.7-11.6) tested positive. The odds of a positive result was nearly doubled for postal and clinic testers, relative to college testers; and increased by 70% for 16-19-year-olds, compared with 13-15-year-olds. Postal testing was the main source for men (80.2%) while 46.1% of women used postal and 48.1% used clinic testing. Postal testing was significantly associated with age, sex and National Health Service (NHS) board area, with odds increasing with age, and lower odds among females than males, and among Lothian residents than those outwith this NHS board area.
  
  
  CONCLUSIONS
  Substantial chlamydial infection was apparent among the young people in this study and positivity rates were highest among postal and clinic testers and those in the 16-19-year age group. While postal kits were the main source for men, and should be used to target them, the combination of this approach with continuing screening programmes in clinic settings would be most effective at targeting those most at risk.
authors.affiliation: Medical Research Council Social and Public Health Sciences Unit, University of Glasgow, Glasgow, UK. lisa@sphsu@mrc.ac.uk
authors.forename: Lisa M
authors.initials: LM
authors.lastname: Williamson
authors.forename: Gordon
authors.initials: G
authors.lastname: Scott
authors.forename: Katy
authors.initials: K
authors.lastname: Carrick-Anderson
authors.forename: Kirsten
authors.initials: K
authors.lastname: Kernaghan
authors.forename: Graham J
authors.initials: GJ
authors.lastname: Hart
mesh_terms: D000293:Adolescent; D000328:Adult; D017677:Age Distribution; D000704:Analysis of Variance; D002690:Chlamydia Infections / Q000175:diagnosis* / Q000453:epidemiology*; D002692:Chlamydia trachomatis / Q000302:isolation & purification*; D003151:Community Health Centers; D005260:Female; D006801:Humans; D008297:Male; D011177:Postal Service; D011933:Reagent Kits, Diagnostic / Q000706:statistics & numerical data; D012606:Scotland / Q000453:epidemiology
chemical_list: D011933:Reagent Kits, Diagnostic