title: Genetic and environmental influences on anorexia nervosa syndromes in a population-based twin sample.
abstract: BACKGROUND
  Genetic and environmental influences on broadly-defined anorexia nervosa (AN) syndrome were examined in a population-based twin sample.
  
  
  METHODS
  AN syndrome was assessed in 672 female 17 year-old twins using structured interviews and a self-report questionnaire.
  
  
  RESULTS
  Twenty-six probands with AN syndrome were identified. Biometrical model-fitting analyses indicated that genetic and non-shared environmental factors accounted for 74% and 26% of the variance in AN syndrome, respectively.
  
  
  CONCLUSIONS
  Findings support previous research indicating significant genetic and non-shared environmental influences on AN syndromes.
authors.affiliation: Department of Psychology, Michigan State University, East Lansing, USA.
authors.forename: K L
authors.initials: KL
authors.lastname: Klump
authors.forename: K B
authors.initials: KB
authors.lastname: Miller
authors.forename: P K
authors.initials: PK
authors.lastname: Keel
authors.forename: M
authors.initials: M
authors.lastname: McGue
authors.forename: W G
authors.initials: WG
authors.lastname: Iacono
mesh_terms: D000293:Adolescent; D000856:Anorexia Nervosa / Q000209:etiology / Q000235:genetics*; D004777:Environment; D005260:Female; D006801:Humans; D012044:Regression Analysis; D012307:Risk Factors