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Effect of polygenic scores on the relationship between psychosis and cognition

  • Lauren Varney*
  • , Krisztina Jedlovszky
  • , Baihan Wang
  • , Stephen Murtough
  • , Marius Cotic
  • , Alvin Richards-Belle
  • , Noushin Saadullah Khani
  • , Robin Lau
  • , Rosemary Abidoph
  • , Andrew McQuillin
  • , Johan H. Thygesen
  • , Matthias Weisbrod
  • , Dan Rujescu
  • , John Powell
  • , Andrew M. McIntosh
  • , Kuang Lin
  • , Cathryn Lewis
  • , Ina Giegling
  • , Marta Di Forti
  • , Maria J. Arranz
  • Neeltje E.M. van Haren, Wim Veling, Jim van Os, Claudia J.P. Simons, Marieke van der Pluijm, Lieuwe de Haan, Wiepke Cahn, Therese van Amelsvoort, Behrooz Z. Alizadeh, Stephan Bender, Benedicto Crespo-Facorro, Jeremy Hall, Conrad Iyegbe, Eugenia Kravariti, Stephen M. Lawrie, Ignacio Mata, Colm McDonald, Robin M. Murray, Diana Prata, Timothea Toulopoulou, Neeltje E.M. van Haren, Elvira Bramon*, ,
*Corresponding author for this work

Research output: Contribution to journalArticleAcademicpeer-review

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Abstract

Cognitive impairment is an important but often under-researched symptom in psychosis. Both psychosis and cognition are highly heritable and there is evidence of a genetic effect on the relationship between them. Using samples of adults (N = 4 506) and children (N = 10 981), we investigated the effect of schizophrenia and bipolar disorder polygenic scores on cognitive performance, and intelligence and educational attainment polygenic scores on psychosis presentation. Schizophrenia polygenic score was negatively associated with visuospatial processing in adults (beta: −0.0569; 95% confidence interval [CI]: −0.0926, −0.0212) and working memory (beta: −0.0432; 95% CI: −0.0697, −0.0168), processing speed (beta: −0.0491; 95% CI: −0.0760, −0.0223), episodic memory (betas: −0.0581 to −0.0430; 95% CIs: −0.0847, −0.0162), executive functioning (beta: −0.0423; 95% CI: −0.0692, −0.0155), fluid intelligence (beta: −0.0583; 95% CI: −0.0847, −0.0320), and total intelligence (beta: −0.0458; 95% CI: −0.0709, −0.0206) in children. Bipolar disorder polygenic score was not associated with any cognitive domains studied. Lower polygenic scores for intelligence were associated with greater odds of psychosis in adults (odds ratio [OR]: 0.886; 95% CI: 0.811–0.968). In children, lower polygenic scores for both intelligence (OR: 0.829; 95% CI: 0.777–0.884) and educational attainment (OR: 0.771; 95% CI: 0.724–0.821) were associated with greater odds of psychotic-like experiences. Our findings suggest that polygenic scores for both cognitive phenotypes and psychosis phenotypes are implicated in the relationship between psychosis and cognitive performance. Further research is needed to determine the direction of this effect and the mechanisms by which it occurs.

Original languageEnglish
Article number491
Number of pages12
JournalTranslational Psychiatry
Volume15
Issue number1
DOIs
Publication statusPublished - 21 Nov 2025

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