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Genetic and environmental influences on binge eating in the absence of compensatory behaviors: A population-based twin study

✍ Scribed by Reichborn-Kjennerud, Ted ;Bulik, Cynthia M. ;Tambs, Kristian ;Harris, Jennifer R.

Publisher
Wiley (John Wiley & Sons)
Year
2004
Tongue
English
Weight
77 KB
Volume
36
Category
Article
ISSN
0276-3478

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✦ Synopsis

Abstract

Objective

The current study explores the extent to which genetic and environmental factors influence liability to binge eating in the absence of compensatory behaviors (BE) in a population‐based sample of twins.

Method

Questionnaire data on 8,045 same‐sex and opposite‐sex twins, aged 18–31 years, from a Norwegian twin registry were used to assess BE during the last 6 months.

Results

The best‐fitting biometrical model suggested that the heritability of BE was 41% (95% confidence interval [CI]: 0.31–0.50). Individual environmental factors accounted for the rest of the variance (59%; 95% CI: 0.50–0.69). No significant sex differences were found, but the statistical power to detect such effects was low. Shared environmental influences on the liability to BE in males could not be ruled out.

Discussion

The findings indicate significant additive genetic influences on BE, supporting the validity of the core features of binge eating disorder as a diagnostic category. Β© 2004 by Wiley Periodicals, Inc. Int J Eat Disord 36: 307–314, 2004.

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