Genetic and environmental associations between body dissatisfaction, weight preoccupation, and binge eating: Evidence for a common factor with differential loadings across symptom type

Shannon M. O'Connor, Christopher R. Beam, Xiaochen Luo, L. Adelyn Cohen, Jessica L. VanHuysse, Robert E. Emery, Eric Turkheimer, Pamela K. Keel, S. Alexandra Burt, Michael Neale, Steven Boker, Kelly Klump

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Objective: Prior twin studies provide support for a single “common factor” that contributes genetic and environmental risk to a range of disordered eating symptoms. However, the common factor may be indexed less well by binge eating (BE) than other symptoms of eating disorders [i.e., body dissatisfaction (BD) and weight preoccupation (WP)]. We sought to explore the presence of a common factor and test whether loadings differed across three key symptoms (i.e., BE, BD, WP). Method: Disordered eating was assessed via self-report in 631 female twin pairs from the Michigan State University Twin Registry. Results: We detected a common disordered eating factor that was influenced primarily by additive genetic and nonshared environmental influences. However, we observed different loadings on this common factor by symptom type, as factor loadings for BD and WP were stronger than that for BE. Moreover, the residual environmental and/or genetic variances (i.e., those that are independent of the common factor) were larger in BE than those of BD or WP. Discussion: Although all three symptoms share a common set of genetic and environmental influences, risk for BE may involve additional genetic, biological, and environmental factors that are not shared with other symptoms of eating pathology.

Original languageEnglish
Pages (from-to)157-161
Number of pages5
JournalInternational Journal of Eating Disorders
Volume50
Issue number2
DOIs
StatePublished - 1 Feb 2017

Keywords

  • binge eating
  • body dissatisfaction
  • common factor
  • eating disorders
  • twins
  • weight preoccupation

Fingerprint

Dive into the research topics of 'Genetic and environmental associations between body dissatisfaction, weight preoccupation, and binge eating: Evidence for a common factor with differential loadings across symptom type'. Together they form a unique fingerprint.

Cite this