title: Population-based study of asymptomatic infection with Chlamydia trachomatis among female and male students.
abstract: There are few epidemiological studies of asymptomatic chlamydial infection among students in non-medical settings with minimal bias and improved accuracy; thus, useful data from screening among students are limited. We aimed to obtain accurate epidemiological information about asymptomatic chlamydial infection among students in non-medical settings. A population-based cross-sectional survey of 10,440 >or=18-year-old asymptomatic students who volunteered for a urine screening test for chlamydia was conducted. The prevalences of asymptomatic infection were 9.5% for women and 6.7% for men. Multivariate analysis revealed the risk factors to be a lifetime history of >or=4 sexual partners for women (odds ratio [OR] 3.17) and inconsistent condom use for men (OR 4.18). For both sexes, younger age at first intercourse was associated with a higher rate of inconsistent condom use. This study produced accurate epidemiological information on asymptomatic chlamydial infection. These results may contribute to the establishment of preventive countermeasures against such infection.
authors.affiliation: Department of Epidemiology, National Institute of Public Health, Wako-shi, Saitama 351-0197, Japan. imaihiro@niph.go.jp
authors.forename: Hirohisa
authors.initials: H
authors.lastname: Imai
authors.forename: H
authors.initials: H
authors.lastname: Nakao
authors.forename: H
authors.initials: H
authors.lastname: Shinohara
authors.forename: Y
authors.initials: Y
authors.lastname: Fujii
authors.forename: H
authors.initials: H
authors.lastname: Tsukino
authors.forename: R
authors.initials: R
authors.lastname: Hamasuna
authors.forename: Y
authors.initials: Y
authors.lastname: Osada
authors.forename: K
authors.initials: K
authors.lastname: Fukushima
authors.forename: M
authors.initials: M
authors.lastname: Inamori
authors.forename: T
authors.initials: T
authors.lastname: Ikenoue
authors.forename: T
authors.initials: T
authors.lastname: Katoh
mesh_terms: D000293:Adolescent; D000328:Adult; D000367:Age Factors; D002690:Chlamydia Infections / Q000453:epidemiology*; D002692:Chlamydia trachomatis; D003075:Coitus; D017280:Condoms / Q000706:statistics & numerical data; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007564:Japan / Q000453:epidemiology; D016015:Logistic Models; D008297:Male; D015995:Prevalence; D012307:Risk Factors; D012747:Sexual Partners; D013334:Students; D014495:Universities; D055815:Young Adult