Cited by 1,391Genetic Associations and EpidemiologyForensic and Genetic ResearchRace, Genetics, and Society

Human Demographic History Impacts Genetic Risk Prediction across Diverse Populations

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Martin, Alicia R., Gignoux, Christopher R., Walters, Raymond K., Wojcik, Genevieve L., Neale, Benjamin M., Gravel, Simon, Daly, Mark J., Bustamante, Carlos D. +1 more·2017·The American Journal of Human Genetics

Published version of a preprint

Abstract

The vast majority of genome-wide association studies (GWASs) are performed in Europeans, and their transferability to other populations is dependent on many factors (e.g., linkage disequilibrium, allele frequencies, genetic architecture). As medical genomics studies become increasingly large and diverse, gaining insights into population history and consequently the transferability of disease risk measurement is critical. Here, we disentangle recent population history in the widely used 1000 Genomes Project reference panel, with an emphasis on populations underrepresented in medical studies. To examine the transferability of single-ancestry GWASs, we used published summary statistics to calculate polygenic risk scores for eight well-studied phenotypes. We identify directional inconsistencies in all scores; for example, height is predicted to decrease with genetic distance from Europeans, despite robust anthropological evidence that West Africans are as tall as Europeans on average. To gain deeper quantitative insights into GWAS transferability, we developed a complex trait coalescent-based simulation framework considering effects of polygenicity, causal allele frequency divergence, and heritability. As expected, correlations between true and inferred risk are typically highest in the population from which summary statistics were derived. We demonstrate that scores inferred from European GWASs are biased by genetic drift in other populations even when choosing the same causal variants and that biases in any direction are possible and unpredictable. This work cautions that summarizing findings from large-scale GWASs may have limited portability to other populations using standard approaches and highlights the need for generalized risk prediction methods and the inclusion of more diverse individuals in medical genomics.

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Crossref · 10.1016/j.ajhg.2017.03.004

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  • Admixture has been an important contributor to modern human genetic variation.

    “Admixture, or the genetic merging of two or more parental lineages, has been demonstrated as an important contributor to modern human genetic variation (Rudan 2006; Hellenthal et al. 2014; Martin et al. 2017).”

    From The Impact of Modern Admixture on Archaic Human Ancestry in Human Populations (2023) · cites this paper as Martin et al. 2017

  • The issues of Eurocentric GWAS biases and imputation panel biases are insurmountable through statistical methods alone, but motivate substantial investments in more diverse populations to produce similar-sized GWAS of biomedical phenotypes in other populations.

    “These issues are insurmountable through statistical methods alone13, but rather motivate substantial investments in more diverse populations to produce similar-sized GWAS of biomedical phenotypes in other populations.”
  • The scientific basis of the imbalance in PRS accuracy has been demonstrated theoretically, in simulations, and empirically across many traits and diseases.

    “The scientific basis of this imbalance has been demonstrated theoretically, in simulations, and empirically across many traits and diseases11–22.”
  • PRS are many-fold more accurate in European ancestry individuals than in others, and this disparity is the major ethical and scientific challenge surrounding clinical implementation.

    “However, the major ethical and scientific challenge surrounding clinical implementation is that they are many-fold more accurate in European ancestry individuals than others.”
  • The most significant associations tend to be more common in the populations in which they are discovered than elsewhere.

    “This dependence means that the most significant associations tend to be more common in the populations in which they are discovered than elsewhere13,30.”

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Authors
Martin, A. R., Gignoux, C. R., Walters, R. K., Wojcik, G. L., Neale, B. M., Gravel, S., Daly, M. J., Bustamante, C. D., & Kenny, E. E.
Affiliations
  • Broad Institute (US)
  • Stanford University (US)
  • McGill University and Génome Québec Innovation Centre (CA)
  • Icahn School of Medicine at Mount Sinai (US)
Corresponding author
Kenny, Eimear E.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2017-04
Volume
100
Issue
4
Pages
635-649
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2598022332
Cited by
1,391
References
111
Citations by year
2026: 77 · 2025: 131 · 2024: 162 · 2023: 149 · 2022: 195 · 2021: 208 · 2020: 206 · 2019: 156 · 2018: 84 · 2017: 21 · 2016: 1
FWCI
84.74
Type
journal article
Language
en
Update notices
erratum (2020-10-01)
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • bioRxiv (Cold Spring Harbor Laboratory) (acceptedVersion, cc-by-nc)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Canadian Institutes of Health Research
  • National Institutes of Health
  • Canada Research Chairs (MOP-136855)
  • National Institute of Mental Health (5U01MH094432-02)
  • National Human Genome Research Institute (R01GM083606, T32HG000044, U01HG005208, U01HG007417, U01HG007419, U01HG009080)
  • National Institute of General Medical Sciences (T32GM007790)
  • Directorate for Mathematical and Physical Sciences (1201234)
  • National Science Foundation
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Forensic and Genetic Research
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Race, Genetics, and Society
Keywords
polygenic risk score, underrepresented groups, demographic history, genetic drift, allele frequency divergence, coalescent simulation, polygenic traits, height, heritability, genetic risk prediction
MeSH terms
Americas, Genetics, Medical, Genetics, Population, Haplotypes, Humans, Human Genome Project, Genetic Predisposition to Disease, Multifactorial Inheritance, Racial Groups

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