Cited by 444Genetic Associations and EpidemiologyForensic and Genetic ResearchRace, Genetics, and Society

Demonstrating stratification in a European American population

Campbell, Catarina D, Ogburn, Elizabeth L, Lunetta, Kathryn L, Lyon, Helen N, Freedman, Matthew L, Groop, Leif C, Altshuler, David, Ardlie, Kristin G +1 more·2005·Nature Genetics

Abstract

Population stratification occurs in case-control association studies when allele frequencies differ between cases and controls because of ancestry. Stratification may lead to false positive associations, although this issue remains controversial. Empirical studies have found little evidence of stratification in European-derived populations, but potentially significant levels of stratification could not be ruled out. We studied a European American panel discordant for height, a heritable trait that varies widely across Europe. Genotyping 178 SNPs and applying standard analytical methods yielded no evidence of stratification. But a SNP in the gene LCT that varies widely in frequency across Europe was strongly associated with height (P < 10(-6)). This apparent association was largely or completely due to stratification; rematching individuals on the basis of European ancestry greatly reduced the apparent association, and no association was observed in Polish or Scandinavian individuals. The failure of standard methods to detect this stratification indicates that new methods may be required.

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Crossref · 10.1038/ng1607

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Authors
Campbell, C. D., Ogburn, E. L., Lunetta, K. L., Lyon, H. N., Freedman, M. L., Groop, L. C., Altshuler, D., Ardlie, K. G., & Hirschhorn, J. N.
Affiliations
  • Boston Children's Hospital (US)
  • Boston University (US)
  • Broad Institute (US)
  • Lund University (SE)
Corresponding author
Hirschhorn, Joel N
Venue
Nature Genetics
Published
2005-07-24
Volume
37
Issue
8
Pages
868-872
ISSN
  • 1061-4036 (ISSN-L)
  • 1546-1718
OpenAlex
W2047923046
Cited by
444
References
31
Citations by year
2026: 1 · 2025: 5 · 2024: 4 · 2023: 5 · 2022: 7 · 2021: 16 · 2020: 13 · 2019: 11 · 2018: 20 · 2017: 18 · 2016: 16 · 2015: 17 · 2014: 18 · 2013: 23 · 2012: 24
FWCI
26.96
Type
journal article
Language
en
Open access
closed
Locations
  • Nature Genetics (publishedVersion)
  • PubMed (publishedVersion)
  • Lund University Publications (Lund University) (submittedVersion)
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
population stratification, European Americans, height, LCT gene, lactase persistence, false positive association, case-control association, SNP genotyping, European ancestry
MeSH terms
Genetics, Population, Genotype, Humans, Polymorphism, Single Nucleotide, White People

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