title: Which sexually active female students get themselves tested for Chlamydia trachomatis? A cohort study.
abstract: Using data from the Prevention of Pelvic Infection (POPI) chlamydia screening trial, we compared the characteristics of female students who did or did not get tested for chlamydia outside the trial during 12 months' follow-up. Of the 2529 women in the trial, we excluded 68 chlamydia positives in the intervention group who were referred for treatment at baseline. Of the remaining 2461 women, 1980 (80%) answered the question about testing during follow-up on their 12 months' questionnaire and were included in the cohort. Of 1980 respondents, 529 (27%) reported having an independent chlamydia test, including 30 (48%) of 63 women with undiagnosed chlamydia at baseline. Predictors of testing included having undiagnosed chlamydia at baseline (adjusted odds ratio 2.44; 95% confidence interval 1.39-4.28), ≥2 sexual partners in the year prior to baseline (OR 1.99; 95% CI 1.60-2.48), history of sexually transmitted infection (1.63: 1.20-2.22); symptoms of pelvic discomfort, dyspareunia, abnormal vaginal discharge or inter-menstrual bleeding (1.38; 1.09-1.73); and black ethnicity (1.37, 1.06-1.76). Although more women with risk factors got tested, half of women with undiagnosed chlamydia did not get tested. To optimise detection of chlamydia, testing should be offered routinely.
authors.affiliation: Population Health Research Institute, St George's, University of London, Cranmer Terrace, Tooting, London, UK srkerry@sgul.ac.uk.
authors.forename: Sarah R
authors.initials: SR
authors.lastname: Kerry
authors.affiliation: Population Health Research Institute, St George's, University of London, Cranmer Terrace, Tooting, London, UK.
authors.forename: Claire M
authors.initials: CM
authors.lastname: Nightingale
authors.affiliation: Department of Genitourinary Medicine, St George's Hospital, London, UK.
authors.forename: Phillip
authors.initials: P
authors.lastname: Hay
authors.affiliation: Population Health Research Institute, St George's, University of London, Cranmer Terrace, Tooting, London, UK.
authors.forename: Pippa
authors.initials: P
authors.lastname: Oakeshott
mesh_terms: D000293:Adolescent; D000328:Adult; D002690:Chlamydia Infections / Q000175:diagnosis* / Q000453:epidemiology; D002692:Chlamydia trachomatis / Q000302:isolation & purification*; D015331:Cohort Studies; D005260:Female; D006801:Humans; D012307:Risk Factors; D012747:Sexual Partners; D013334:Students / Q000523:psychology / Q000706:statistics & numerical data*; D011795:Surveys and Questionnaires; D055815:Young Adult
keywords: Chlamydia screening; cohort study; female students; risk factors; sexual partners; sexually transmitted infection