Cited by 340Genetic Associations and EpidemiologyForensic and Genetic ResearchGenetic diversity and population structure

The Power of Genomic Control

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Bacanu, Silviu-Alin, Devlin, B., Roeder, Kathryn·2000·The American Journal of Human Genetics

Abstract

Although association analysis is a useful tool for uncovering the genetic underpinnings of complex traits, its utility is diminished by population substructure, which can produce spurious association between phenotype and genotype within population-based samples. Because family-based designs are robust against substructure, they have risen to the fore of association analysis. Yet, if population substructure could be ignored, this robustness can come at the price of power. Unfortunately it is rarely evident when population substructure can be ignored. Devlin and Roeder recently have proposed a method, termed "genomic control" (GC), which has the robustness of family-based designs even though it uses population-based data. GC uses the genome itself to determine appropriate corrections for population-based association tests. Using the GC method, we contrast the power of two study designs, family trios (i.e., father, mother, and affected progeny) versus case-control. For analysis of trios, we use the TDT test. When population substructure is absent, we find GC is always more powerful than TDT; furthermore, contrary to previous results, we show that as a disease becomes more prevalent the discrepancy in power becomes more extreme. When population substructure is present, however, the results are more complex: TDT is more powerful when population substructure is substantial, and GC is more powerful otherwise. We also explore general issues of power and implementation of GC within the case-control setting and find that, economically, GC is at least comparable to and often less expensive than family-based methods. Therefore, GC methods should prove a useful complement to family-based methods for the genetic analysis of complex traits.

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Crossref · 10.1086/302929

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Authors
Bacanu, S.-A., Devlin, B., & Roeder, K.
Affiliations
  • University of Pittsburgh (US)
  • Carnegie Mellon University (US)
Corresponding author
  • Bacanu, Silviu-Alin
  • Devlin, B.
Venue
The American Journal of Human Genetics
Publisher
Elsevier BV
Published
2000-06
Volume
66
Issue
6
Pages
1933-1944
ISSN
0002-9297 (ISSN-L)
OpenAlex
W2056866499
Cited by
340
References
35
Citations by year
2026: 2 · 2025: 4 · 2024: 1 · 2023: 3 · 2022: 2 · 2021: 4 · 2020: 4 · 2019: 8 · 2018: 5 · 2016: 3 · 2015: 7 · 2014: 7 · 2013: 6 · 2012: 17
FWCI
14.38
Type
journal article
Language
en
Open access
Locations
  • The American Journal of Human Genetics (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Institute of Mental Health (MH 57881, P01MH056193, MH 56193)
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
genomic control, population substructure, statistical power, family-based association, case-control association, transmission disequilibrium test, family trios, spurious association, complex traits, disease prevalence, cost comparison
MeSH terms
Alleles, Chromosome Mapping, Computer Simulation, Europe, Female, Gene Frequency, Genetics, Population, Genotype, Humans, Male, Models, Genetic, Nuclear Family, Polymorphism, Genetic, Probability, Regression Analysis, Genetic Variation, Linkage Disequilibrium, Genome, Human, Case-Control Studies

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