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Genetic and environmental influences on anorexia nervosa syndromes in a population-based twin sample
K L Klump1, K B Miller, P K Keel
1Department of Psychology, Michigan State University, East Lansing, USA.
Psychological Medicine
|May 16, 2001
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.