title: Body dissatisfaction and drive for thinness in young adult twins.
abstract: OBJECTIVE
  We explored correlates of the Eating Disorder Inventory subscales Body Dissatisfaction (BD) and Drive for Thinness (DT) and genetic and environmental influences on these traits.
  
  
  METHODS
  In a population-based sample of 4,667 Finnish twins aged 22-27 years, we conducted twin modeling to explore genetic and environmental contributions to body dissatisfaction and drive for thinness. Logistic regression was used for the correlational analysis.
  
  
  RESULTS
  Various eating and body size-related factors and psychosomatic symptoms were significantly associated with high body dissatisfaction and drive for thinness in both genders. In women, early puberty onset, early initiation of sexual activity, and multiple sex partners were statistically significant risk factors of body dissatisfaction. In gender-specific univariate twin models, additive genes accounted for 59.4% (95% confidence interval [CI] = 53.2-64.7%) of the variance in body dissatisfaction and for 51.0% (95% CI = 43.7-57.5%) of the variance in drive for thinness among females, but for none of the variance among males.
  
  
  CONCLUSIONS
  There are very distinct gender differences in the heritability patterns of body dissatisfaction and drive for thinness in young adults.
authors.affiliation: Department of Public Health, University of Helsinki, Helsinki, Finland. anna.keski-rahkonen@helsinki.fi
authors.forename: Anna
authors.initials: A
authors.lastname: Keski-Rahkonen
authors.forename: Cynthia M
authors.initials: CM
authors.lastname: Bulik
authors.forename: Benjamin M
authors.initials: BM
authors.lastname: Neale
authors.forename: Richard J
authors.initials: RJ
authors.lastname: Rose
authors.forename: Aila
authors.initials: A
authors.lastname: Rissanen
authors.forename: Jaakko
authors.initials: J
authors.lastname: Kaprio
mesh_terms: D000328:Adult; D001828:Body Image; D004328:Drive; D001068:Feeding and Eating Disorders / Q000235:genetics* / Q000523:psychology*; D005260:Female; D005387:Finland; D006801:Humans; D016015:Logistic Models; D008137:Longitudinal Studies; D008297:Male; D015999:Multivariate Analysis; D012307:Risk Factors; D012737:Sex Factors; D013851:Thinness / Q000523:psychology*