Genetic Risk Scores

Jessica N. Cooke Bailey1, Robert P. Igo1

1 Department of Epidemiology and Biostatistics, Case Western Reserve University, Cleveland, Ohio
Publication Name:  Current Protocols in Human Genetics
Unit Number:  Unit 1.29
DOI:  10.1002/cphg.20
Online Posting Date:  October, 2016
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The generation of genome‐wide variation data has become commonplace. However, the potential for interpretation and application of these data for clinical assessment of outcomes of interest, and prediction of disease risk, is currently not fully realized. Many common, complex diseases now have numerous, well‐established “risk” loci, and likely harbor many genetic determinants with effects too small to be detected at genome‐wide levels of statistical significance. A simple and intuitive approach for converting genetic data to a predictive measure of disease susceptibility is to aggregate the risk effects of these loci into a single genetic risk score. Here, some common methods and software packages for calculating genetic risk scores, with focus on studies of common, complex diseases, are described. The basic information needed as well as important considerations for constructing genetic risk scores, including specific requirements for phenotypic and genetic data, and limitations in their application is reviewed. © 2016 by John Wiley & Sons, Inc.

Keywords: auc; complex diseases; complex traits; disease prediction; genetic risk score

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Table of Contents

  • Definitions
  • Genetic Risk Scores
  • GRS Methods
  • Critical Parameters and Complicating Factors
  • Acknowledgments
  • Literature Cited
  • Figures
  • Tables
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Literature Cited

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