title: Prevalence and dimensions of sexual orientation in Swiss adolescents: a cross-sectional survey of 16 to 20-year-old students.
abstract: OBJECTIVE
  Sexual orientation plays an important part in building identity during adolescence. The aim of this study was to describe patterns of sexual orientation, including sexual attraction, fantasies, affiliations and behaviour.
  
  
  METHODS
  The study was based on the analysis of data from computerized self-administered questionnaires of a Swiss national survey on the sexual life of 16 to 20-year-old adolescents (n = 2,075 girls and 2,208 boys.).
  
  
  RESULTS
  Overall, 95.0% of girls and 96.2% of boys described themselves as predominantly heterosexual; 1.4% of girls and 1.7% of boys as predominantly homosexual or bisexual; and 2.8% of teenagers (girls: 3.6%; boys: 2.1%) were "unsure" of their sexual orientation. The reported prevalence of homosexual attraction (girls: 2.0%; boys: 2.9%) exceeded homosexual fantasies (girls: 0.4%; boys: 0.5%) and affiliations (girls: 0.3%; boys: 0.5%). Among the 4205 respondents, 31 girls (1.5% of girls) and 56 boys (2.5% of boys) reported sexual behaviour (experience or penetrative intercourse) with a person of the same sex. Among 1.5% of girls and 2.5% of boys who reported sexual behaviour with a person of the same sex, 65% of boys and 80% of girls nevertheless considered themselves as heterosexual.
  
  
  CONCLUSIONS
  For a comprehensive understanding of sexual orientation in adolescence a differentiated look at dimensions of sexual orientation is indispensable. This applies to clinical settings, public health and research.
authors.affiliation: Institut Universitaire de Médecine Sociale et Preventive, Lausanne, Switzerland. Francoise.Narring@inst.hospvd.ch
authors.forename: F
authors.initials: F
authors.lastname: Narring
authors.forename: S M
authors.initials: SM
authors.lastname: Stronski Huwiler
authors.forename: P A
authors.initials: PA
authors.lastname: Michaud
mesh_terms: D000293:Adolescent; D000294:Adolescent Behavior / Q000523:psychology; D000328:Adult; D000367:Age Factors; D003430:Cross-Sectional Studies; D005201:Fantasy; D005260:Female; D006801:Humans; D007062:Identification, Psychological; D008297:Male; D012725:Sexual Behavior / Q000523:psychology / Q000706:statistics & numerical data*; D019529:Sexuality / Q000523:psychology / Q000706:statistics & numerical data*; D012959:Socioeconomic Factors; D013557:Switzerland