Cited by 960Genetic Associations and EpidemiologyGenetics and Physical PerformanceGenetic and phenotypic traits in livestock

Causal associations between risk factors and common diseases inferred from GWAS summary data

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Zhu, Zhihong, Zheng, Zhili, Zhang, Futao, Wu, Yang, Trzaskowski, Maciej, Maier, Robert, Robinson, Matthew R., McGrath, John J. +3 more·2018·Nature Communications

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Abstract

Health risk factors such as body mass index (BMI) and serum cholesterol are associated with many common diseases. It often remains unclear whether the risk factors are cause or consequence of disease, or whether the associations are the result of confounding. We develop and apply a method (called GSMR) that performs a multi-SNP Mendelian randomization analysis using summary-level data from genome-wide association studies to test the causal associations of BMI, waist-to-hip ratio, serum cholesterols, blood pressures, height, and years of schooling (EduYears) with common diseases (sample sizes of up to 405,072). We identify a number of causal associations including a protective effect of LDL-cholesterol against type-2 diabetes (T2D) that might explain the side effects of statins on T2D, a protective effect of EduYears against Alzheimer’s disease, and bidirectional associations with opposite effects (e.g., higher BMI increases the risk of T2D but the effect of T2D on BMI is negative).

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  • GSMR can help differentiate the likely causal direction of association between two traits but cannot make any statement about the intermediate mechanisms involved in any potential causal process.

    “This method can help differentiate the likely causal direction of association between two traits but cannot make any statement about the intermediate mechanisms involved in any potential causal process.”

    From Genome-wide association meta-analysis in 269,867 individuals identifies new genetic and functional links to intelligence (2018) · cites this paper as [29]

    The Methods section describes GSMR as testing whether an exposure causally affects an outcome, and the Results section uses forward and reverse GSMR analyses to assess direction. The Results also say it is difficult to distinguish whether an effect is mediated by other risk factors or driven by them. But the paper does examine associations among risk factors and conditional effects, so the categorical claim that GSMR cannot make any statement about intermediate mechanisms overstates its stated limitation. Page numbers are unavailable in our copy. (LLM, conf=0.86)

    Experimental — accuracy not yet measured
  • The estimated GSMR causal effect coefficients (bxy) are approximately equal to the natural log odds ratio for a case-control trait.

    “The estimated causal effect coefficients (b xy ) are approximately equal to the natural log odds ratio (OR) for a case-control trait 29 .”

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Authors
Zhu, Z., Zheng, Z., Zhang, F., Wu, Y., Trzaskowski, M., Maier, R., Robinson, M. R., McGrath, J. J., Visscher, P. M., Wray, N. R., & Yang, J.
Affiliations
The University of Queensland (AU)
Corresponding author
Yang, Jian
Venue
Nature Communications
Published
2018-01-15
Volume
9
Issue
1
Pages
224-224
ISSN
2041-1723 (ISSN-L)
OpenAlex
W2949543964
Cited by
951
References
69
Citations by year
2026: 92 · 2025: 136 · 2024: 134 · 2023: 129 · 2022: 115 · 2021: 122 · 2020: 102 · 2019: 81 · 2018: 35 · 2017: 1 · 2016: 1 · 2015: 1
FWCI
51.44
Type
journal article
Language
en
Open access
Locations
  • Nature Communications (publishedVersion, cc-by)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc-nd)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • SERVAL (Université de Lausanne) (publishedVersion, cc-by)
  • IRIS (submittedVersion, cc-by)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion)
  • IRIS (submittedVersion)
  • SERVAL (Université de Lausanne) (submittedVersion)
Funders
  • National Research Foundation
  • Danmarks Grundforskningsfond
  • Lundbeckfonden (R155-2014-1724, R248‐2017‐2003)
  • Medical Research Council (1107258, 1113400, 1078037, 1078901)
  • Australian Research Council (DP160101343, 1113400)
  • National Health and Medical Research Council (1113400, 1078901, 1056929, 1107258, 1078037, 1048853)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetics and Physical Performance
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic and phenotypic traits in livestock
Keywords
causal inference, Mendelian randomization, body mass index, waist-to-hip ratio, serum cholesterol, LDL cholesterol, type 2 diabetes, Alzheimer's disease, years of schooling, blood pressure, height, confounding, statin adverse effects
MeSH terms
Alzheimer Disease, Cholesterol, Diabetes Mellitus, Type 2, Disease, Humans, Cholesterol, LDL, Risk Factors, Body Mass Index, Polymorphism, Single Nucleotide, Genome-Wide Association Study, Mendelian Randomization Analysis

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