Cited by 1,113Genetic Associations and EpidemiologyGenomics and Rare DiseasesGenetic Mapping and Diversity in Plants and Animals

A Groupwise Association Test for Rare Mutations Using a Weighted Sum Statistic

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Madsen, Bo Eskerod, Browning, Sharon R.·2009·PLoS Genetics

Abstract

Resequencing is an emerging tool for identification of rare disease-associated mutations. Rare mutations are difficult to tag with SNP genotyping, as genotyping studies are designed to detect common variants. However, studies have shown that genetic heterogeneity is a probable scenario for common diseases, in which multiple rare mutations together explain a large proportion of the genetic basis for the disease. Thus, we propose a weighted-sum method to jointly analyse a group of mutations in order to test for groupwise association with disease status. For example, such a group of mutations may result from resequencing a gene. We compare the proposed weighted-sum method to alternative methods and show that it is powerful for identifying disease-associated genes, both on simulated and Encode data. Using the weighted-sum method, a resequencing study can identify a disease-associated gene with an overall population attributable risk (PAR) of 2%, even when each individual mutation has much lower PAR, using 1,000 to 7,000 affected and unaffected individuals, depending on the underlying genetic model. This study thus demonstrates that resequencing studies can identify important genetic associations, provided that specialised analysis methods, such as the weighted-sum method, are used.

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  • Madsen and Browning showed that their proposed frequency-weighted statistic is more powerful than either the CAST or CMC methods in a number of settings.

    “Madsen and Browning showed that their proposed statistic is more powerful than either the CAST or CMC methods in a number of settings, but more work in this area is needed to clarify the advantages, if any, of each.34”

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Authors
Madsen, B. E., & Browning, S. R.
Affiliations
  • Aarhus University (DK)
  • University of Auckland (NZ)
Corresponding author
Browning, Sharon R.
Venue
PLoS Genetics
Published
2009-02-13
Volume
5
Issue
2
Pages
e1000384
ISSN
  • 1553-7390 (ISSN-L)
  • 1553-7404
OpenAlex
W2029387902
Cited by
1,113
References
43
Citations by year
2026: 15 · 2025: 29 · 2024: 23 · 2023: 43 · 2022: 45 · 2021: 46 · 2020: 47 · 2019: 70 · 2018: 68 · 2017: 69 · 2016: 91 · 2015: 87 · 2014: 115 · 2013: 114 · 2012: 96
FWCI
48.75
Type
journal article
Language
en
Open access
Locations
  • PLoS Genetics (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • RePEc: Research Papers in Economics (submittedVersion)
  • DOAJ (DOAJ: Directory of Open Access Journals) (submittedVersion, cc-by-sa)
  • Figshare (submittedVersion, cc-by)
Funders
  • University of Auckland
  • National Institutes of Health
  • National Institute of General Medical Sciences (R01GM075091)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Associations and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genomics and Rare Diseases
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Genetic Mapping and Diversity in Plants and Animals
Keywords
rare mutations, genetic heterogeneity, resequencing, disease-associated genes, population attributable risk, genetic association
MeSH terms
DNA Mutational Analysis, Genetic Testing, Genetics, Population, Humans, Mutation, Genetic Variation, Models, Statistical, Genetic Predisposition to Disease

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