Sleep and schizophrenia polygenic scores in non-affective and affective psychotic disorders

Erik Cederlöf, Minna Holm, Anders Kämpe, Ari Ahola-Olli, Katri Kantojärvi, Markku Lähteenvuo, Johan Ahti, Jarmo Hietala, Katja Häkkinen, Erkki Isometsä, Annamari Tuulio-Henriksson, Olli Kampman, Kaisla Lahdensuo, Jouko Lönnqvist, Jari Tiihonen, Hannu Turunen, Asko Wegelius, Juha Veijola, Tuula Kieseppä, Aarno PalotieTiina Paunio

Research output: Contribution to journalArticleScientificpeer-review

Abstract

Background Sleep problems are common in psychotic disorders and are associated with worse quality of life and disease prognosis. Genome-wide association studies (GWAS) have revealed genetic influences for schizophrenia and sleep, but polygenic scores (PGSs) for sleep traits have not been evaluated systematically in patients with psychotic disorders. Methods This study investigated the associations between PGSs for sleep traits (insomnia, PGSINS; sleep duration, PGSSD; short sleep duration, PGSSS; long sleep duration; PGSLS), diurnal preference (eveningness, PGSME), and schizophrenia (PGSSZ) with clinical features of psychotic disorders in the Finnish SUPER study comprising 8,232 patients with psychotic disorders. The measures included self-reported sleep and well-being, cognitive assessments, clozapine use, and functional outcomes. Using FinnGen data of 356,077 individuals, we analyzed the distributions of PGSs in psychotic and bipolar disorders and the general population. Results PGSINS associated with more sleep problems and worse well-being (e.g. worse health-related quality of life [β = -0.07, CI = -0.09, -0.05, p < .001]). High PGSSZ is associated with better sleep quality, worse clinical outcomes, and performance in cognitive tests (e.g. more errors in paired-associated learning [β = 0.07, CI = 0.04, 0.09, p < .001]). PGSINS was higher in affective psychotic and bipolar disorders, while PGSSD and PGSME were higher in schizophrenia as compared with individuals with no psychiatric disorders. Conclusion Genetic risks for sleep and diurnal preference vary between non-affective psychosis, affective psychosis, and the general population. The findings in this study emphasize the heterogeneity in genetic etiology of the objective features of disease severity and the more subjective measures related to well-being and self-reported measures of sleep.

Original languageEnglish
Article numbere117
JournalPsychological Medicine
Volume55
Number of pages10
ISSN0033-2917
DOIs
Publication statusPublished - 15 Apr 2025
MoE publication typeA1 Journal article-refereed

Bibliographical note

Publisher Copyright:
© The Author(s), 2025. Published by Cambridge University Press.

Fields of Science

  • cognition
  • polygenic scores
  • psychotic disorders
  • schizophrenia
  • sleep
  • 3124 Neurology and psychiatry

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