Personality-obesity associations are driven by narrow traits: A meta-analysis

Uku Vainik, Alain Dagher, Anu Realo, Lucía Colodro-Conde, Erik Lykke Mortensen, Kerry Jang, Juko Ando, Christian Kandler, Thorkild Sørensen, Rene Mottus

Research output: Contribution to journalArticlepeer-review

Abstract

Obesity has inconsistent associations with broad personality domains, possibly because the links pertain to only some facets of these domains. Collating published and unpublished studies (N = 14,848), we meta-analysed the associations between body mass index (BMI) and 30 Five-Factor Model personality facets. BMI had a positive association with Neuroticism and a negative association with Conscientiousness domains. At the facet level, we found associations between BMI and 15 facets from all five personality domains, with only some Neuroticism and Conscientiousness facets among them. Certain personality—BMI associations were moderated by sample properties, such as proportions of women or participants with obesity; these moderation effects were replicated in the individual-level analysis. Finally, facet-based personality “risk” scores accounted for 2.3% of variance in BMI in a separate sample of individuals (N = 3,569), 409% more than domain-based scores. Taken together, personality—BMI associations are facet-specific and delineating them may help to explain obesity-related behaviors and inform intervention designs. Preprint and data are available at https://psyarxiv.com/z35vn
Original languageEnglish
JournalObesity Reviews
Early online date15 Apr 2019
DOIs
Publication statusE-pub ahead of print - 15 Apr 2019

Keywords

  • prediction
  • personality
  • facet
  • risk score
  • moderator
  • body mass index

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