Cited by 876Genetic Associations and EpidemiologyForensic and Genetic ResearchGenetic diversity and population structure

The effects of human population structure on large genetic association studies

Marchini, Jonathan, Cardon, Lon R, Phillips, Michael S, Donnelly, Peter·2004·Nature Genetics

Abstract

Large-scale association studies hold substantial promise for unraveling the genetic basis of common human diseases. A well-known problem with such studies is the presence of undetected population structure, which can lead to both false positive results and failures to detect genuine associations. Here we examine approximately 15,000 genome-wide single-nucleotide polymorphisms typed in three population groups to assess the consequences of population structure on the coming generation of association studies. The consequences of population structure on association outcomes increase markedly with sample size. For the size of study needed to detect typical genetic effects in common diseases, even the modest levels of population structure within population groups cannot safely be ignored. We also examine one method for correcting for population structure (Genomic Control). Although it often performs well, it may not correct for structure if too few loci are used and may overcorrect in other settings, leading to substantial loss of power. The results of our analysis can guide the design of large-scale association studies.

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Crossref · 10.1038/ng1337

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Authors
Marchini, J., Cardon, L. R., Phillips, M. S., & Donnelly, P.
Affiliations
  • University of Oxford (GB)
  • Centre for Human Genetics (GB)
  • McGill Genome Centre (CA)
Corresponding author
Donnelly, Peter
Venue
Nature Genetics
Published
2004-03-28
Volume
36
Issue
5
Pages
512-517
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W1986265706
Cited by
869
References
31
Citations by year
2026: 11 · 2025: 13 · 2024: 14 · 2023: 19 · 2022: 29 · 2021: 34 · 2020: 16 · 2019: 30 · 2018: 38 · 2017: 35 · 2016: 33 · 2015: 39 · 2014: 28 · 2013: 46 · 2012: 48
FWCI
31.50
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Wellcome Trust
  • National Institutes of Health
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 › Genetic diversity and population structure
Keywords
population structure, genetic association studies, single nucleotide polymorphisms, genomic control, false positives, statistical power, common diseases
MeSH terms
Genetic Markers, Genetics, Population, Humans, Models, Genetic, Genetic Variation, Linkage Disequilibrium, Quantitative Trait, Heritable, Genetic Predisposition to Disease, Polymorphism, Single Nucleotide

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