Genetic propensities for verbal and spatial ability have opposite effects on body mass index and risk of schizophrenia

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Abstract

We generated two polygenic scores, one capturing verbal and the other spatial aspects of cognitive ability, using UK Biobank data and studied their effects on various diseases and other traits in the Icelandic population. The score tagging spatial ability associated with higher body mass index (β = 0.032, p = 3.2 × 10−13), but lower risk of schizophrenia (OR = 0.82, p = 8.8 × 10−9) and other mental disorders. Furthermore, it associated with less openness, a personality trait reflecting curiosity and creativity (β = −0.023, p = 1.3 × 10−4). Conversely, the score tagging verbal ability associated with lower body mass index (β = −0.023, p = 1.6 × 10−7) and more openness (β = 0.045, p = 3.5 × 10−14), but did not associate with risk of schizophrenia (OR = 0.97, p = 0.42). Furthermore, applying genomic structural equation modeling, we observed that the genetic component of verbal ability associated positively with the genetic component of schizophrenia after conditioning on the g factor (bg = 0.193, p = 5.4 × 10−4). Thus, at the genetic level, verbal and spatial ability exhibit contrasting associations with indicators of mental and physical health, as well as with personality.

Original languageEnglish
Article number101565
JournalIntelligence
Volume88
DOIs
Publication statusPublished - 1 Sept 2021

Bibliographical note

Funding Information: We would like to thank participants in deCODE studies for their contribution. We would also like to thank employees at the Research Recruitment Center and staff at deCODE genetics core facilities who contributed to recruitment, sample handling and genotyping. This research has been conducted using the UK Biobank Resource under Application Number 24898 and in part funded through the European Union's Horizon 2020 research and innovation programme (Grant agreement Number 847776 ). Publisher Copyright: © 2021 The Authors

Other keywords

  • Body mass index
  • Cognitive ability
  • Geðklofi
  • Health
  • Intelligence
  • Learning disability
  • Líkamsþyngdarstuðull
  • Personality
  • Polygenic score
  • Schizophrenia

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