Cited by 94Sleep and related disordersGenetic Associations and EpidemiologyMental Health Research Topics

The bidirectional causal relationships of insomnia with five major psychiatric disorders: A Mendelian randomization study

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Gao, Xue, Meng, Ling-Xian, Ma, Kai-Li, Liang, Jie, Wang, Hui, Gao, Qian, Wang, Tong·2019·European Psychiatry

Abstract

Background: Several observational studies have investigated the association of insomnia with psychiatric disorders. Such studies yielded mixed results, and whether these associations are causal remains unclear. Thus, we aimed to identify the causal relationships between insomnia and five major psychiatric disorders. Methods: The analysis was implemented with six genome-wide association studies; one for insomnia and five for psychiatric disorders (attention-deficit/hyperactivity disorder, autism spectrum disorder, major depressive disorder, schizophrenia, and bipolar disorder). A heterogeneity in dependent instrument (HEIDI) approach was used to remove the pleiotropic instruments, Mendelian randomization (MR)-Egger regression was adopted to test the validity of the screened instruments, and bidirectional generalized summary data-based MR was performed to estimate the causal relationships between insomnia and these major psychiatric disorders. Results: We observed significant causal effects of insomnia on the risk of autism spectrum disorder and bipolar disorder, with odds ratios of 1.739 (95% confidence interval: 1.217–2.486, p = 0.002) and 1.786 (95% confidence interval: 1.396–2.285, p = 4.02 × 10−6), respectively. There was no convincing evidence of reverse causality for insomnia with these two disorders (p = 0.945 and 0.546, respectively). When insomnia was considered as either the exposure or outcome variable, causal estimates for the remaining three psychiatric disorders were not significant. Conclusions: Our results suggest a causal role of insomnia in autism spectrum disorder and bipolar disorder. Future disease models should include insomnia as a factor for these two disorders to develop effective interventions. More detailed mechanism studies may also be inspired by this causal inference.

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Authors
Gao, X., Meng, L.-X., Ma, K.-L., Liang, J., Wang, H., Gao, Q., & Wang, T.
Affiliations
Shanxi Medical University (CN)
Corresponding author
Wang, Tong
Venue
European Psychiatry
Published
2019-08-01
Volume
60
Pages
79-85
ISSN
  • 0924-9338 (ISSN-L)
  • 1778-3585
OpenAlex
W2953249511
Cited by
94
References
66
Citations by year
2026: 9 · 2025: 23 · 2024: 25 · 2023: 12 · 2022: 17 · 2021: 3 · 2020: 5
FWCI
7.36
Type
journal article
Language
en
Open access
Locations
  • European Psychiatry (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Natural Science Foundation of China (81872715)
  • Innovation Foundation for Graduate Student of Shanxi Province (2018JD25)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and related disorders
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Mental Health Research Topics
Keywords
insomnia, mental illness, causal inference, autism spectrum disorder, bipolar disorder, major depressive disorder, schizophrenia, attention deficit hyperactivity disorder, bidirectional causality, reverse causality, pleiotropy
MeSH terms
Autism Spectrum Disorder, Attention Deficit Disorder with Hyperactivity, Bipolar Disorder, Depressive Disorder, Major, Major Depressive Disorder, Humans, Sleep Initiation and Maintenance Disorders, Schizophrenia, Causality, Odds Ratio, Genetic Predisposition to Disease, Genome-Wide Association Study, Mendelian Randomization Analysis

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