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PRSice: Polygenic Risk Score software

Open access
Euesden, Jack, Lewis, Cathryn M., O’Reilly, Paul F.·2015·Bioinformatics

Abstract

Summary: A polygenic risk score (PRS) is a sum of trait-associated alleles across many genetic loci, typically weighted by effect sizes estimated from a genome-wide association study. The application of PRS has grown in recent years as their utility for detecting shared genetic aetiology among traits has become appreciated; PRS can also be used to establish the presence of a genetic signal in underpowered studies, to infer the genetic architecture of a trait, for screening in clinical trials, and can act as a biomarker for a phenotype. Here we present the first dedicated PRS software, PRSice (‘precise'), for calculating, applying, evaluating and plotting the results of PRS. PRSice can calculate PRS at a large number of thresholds (“high resolution”) to provide the best-fit PRS, as well as provide results calculated at broad P-value thresholds, can thin Single Nucleotide Polymorphisms (SNPs) according to linkage disequilibrium and P-value or use all SNPs, handles genotyped and imputed data, can calculate and incorporate ancestry-informative variables, and can apply PRS across multiple traits in a single run. We exemplify the use of PRSice via application to data on schizophrenia, major depressive disorder and smoking, illustrate the importance of identifying the best-fit PRS and estimate a P-value significance threshold for high-resolution PRS studies. Availability and implementation: PRSice is written in R, including wrappers for bash data management scripts and PLINK-1.9 to minimize computational time. PRSice runs as a command-line program with a variety of user-options, and is freely available for download from http://PRSice.info Contact: jack.euesden@kcl.ac.uk or paul.oreilly@kcl.ac.uk Supplementary information: Supplementary data are available at Bioinformatics online.

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Metadata

Authors
Euesden, J., Lewis, C. M., & O’Reilly, P. F.
Venue
Bioinformatics
Published
2014-12-29
Volume
31
Issue
9
Pages
1466-1468
ISSN
  • 1367-4803 (ISSN-L)
  • 1367-4811
OpenAlex
W2110048796
Cited by
1,191
References
5
FWCI
23.18
Type
journal article
Language
en
Open access
hybrid

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