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Personality Traits and Obesity.

Jelena Bagnjuk1, Hans-Helmut König2, André Hajek2

  • 1Department of Health Economics and Health Services Research, University Medical Center Hamburg-Eppendorf, Hamburg 20246, Germany. j.bagnjuk@uke.de.

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|July 31, 2019
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Summary
This summary is machine-generated.

Personality traits like agreeableness are linked to body weight, but findings differ between cross-sectional and longitudinal studies. Longitudinal data suggests agreeableness negatively impacts obesity, contrasting previous research.

Keywords:
GSOEPagreeablenessexcess weightobesityoverweightpersonality

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Area of Science:

  • Psychology
  • Behavioral Science
  • Epidemiology

Background:

  • Previous research on body weight and personality traits shows inconsistent results.
  • Large-scale studies are needed to clarify the relationship between personality and obesity.
  • Utilizing diverse study designs can provide more robust estimates.

Purpose of the Study:

  • To investigate the association between personality traits and obesity using both cross-sectional and longitudinal data.
  • To provide more consistent estimates of personality's effect on body mass index (BMI).
  • To examine personality factors measured by the BFI-S Questionnaire in relation to obesity.

Main Methods:

  • Analysis of data from the German Socio-Economic Panel (GSOEP) waves 2005-2013.
  • Application of cross-sectional and longitudinal logistic regression models.
  • Inclusion of self-rated body mass index (BMI) and personality data, controlling for confounders.

Main Results:

  • Cross-sectional analysis identified significant associations between obesity and neuroticism, extraversion, openness, and agreeableness.
  • After controlling for confounders, extraversion, openness, agreeableness, and conscientiousness remained significant in the cross-sectional analysis.
  • Longitudinal analysis revealed a significant negative association between obesity and agreeableness, with extraversion also significant initially.

Conclusions:

  • Study designs significantly influence the observed relationship between personality traits and obesity.
  • Longitudinal findings highlight agreeableness as a key personality factor associated with excess weight.
  • The results contrast with much of the prior research on personality and obesity.