title: Concurrent sex partners and risk for sexually transmitted diseases among adolescents.
abstract: OBJECTIVE
  A large percentage of sexually active adolescents have multiple sex partners and are at high risk of acquiring sexually transmitted diseases (STDs). Little is known about adolescents' patterns of sexual partnerships (e.g., concurrent versus serial) and how these patterns influence STD risk.
  
  
  OBJECTIVE
  To determine the frequency with which adolescents have concurrent partners during a main relationship and the association between having concurrent partners and STD risk.
  
  
  METHODS
  Adolescents seeking care at a public STD clinic were recruited from March, 1996, to May, 1998. Demographic and behavioral data were obtained during an interviewer-administered questionnaire. Sexually transmitted disease testing and physical exams were performed by clinicians.
  
  
  RESULTS
  Of those adolescents who reported having at least one main partner during the previous 6 months (n = 245), 110 (44.9%) had multiple partners, and 76 (31%) had at least one concurrent partner during a main relationship. Greater number of concurrent partners was associated with STD diagnosis/exposure after controlling for number of sex partners (OR = 1.6; 95% CI, 1.1-2.4).
  
  
  CONCLUSIONS
  A significant percentage of adolescents have concurrent partners during a main relationship, and having concurrent partners increases STD risk.
authors.affiliation: Department of Pediatrics, University of California, San Francisco, School of Medicine, 94118, USA.
authors.forename: M D
authors.initials: MD
authors.lastname: Rosenberg
authors.forename: J E
authors.initials: JE
authors.lastname: Gurvey
authors.forename: N
authors.initials: N
authors.lastname: Adler
authors.forename: M B
authors.initials: MB
authors.lastname: Dunlop
authors.forename: J M
authors.initials: JM
authors.lastname: Ellen
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior; D000328:Adult; D005260:Female; D006801:Humans; D008297:Male; D012306:Risk; D012309:Risk-Taking; D012725:Sexual Behavior; D012749:Sexually Transmitted Diseases / Q000175:diagnosis / Q000209:etiology*; D011795:Surveys and Questionnaires