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Testing significance relative to a fold-change threshold is a TREAT

Open access
McCarthy, Davis J., Smyth, Gordon K.·2009·Bioinformatics

Abstract

Motivation: Statistical methods are used to test for the differential expression of genes in microarray experiments. The most widely used methods successfully test whether the true differential expression is different from zero, but give no assurance that the differences found are large enough to be biologically meaningful. Results: We present a method, t-tests relative to a threshold (TREAT), that allows researchers to test formally the hypothesis (with associated p-values) that the differential expression in a microarray experiment is greater than a given (biologically meaningful) threshold. We have evaluated the method using simulated data, a dataset from a quality control experiment for microarrays and data from a biological experiment investigating histone deacetylase inhibitors. When the magnitude of differential expression is taken into account, TREAT improves upon the false discovery rate of existing methods and identifies more biologically relevant genes. Availability: R code implementing our methods is contributed to the software package limma available at http://www.bioconductor.org. Contact: smyth@wehi.edu.au

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Metadata

Authors
McCarthy, D. J., & Smyth, G. K.
Venue
Bioinformatics
Published
2009-01-28
Volume
25
Issue
6
Pages
765-771
ISSN
  • 1367-4803 (ISSN-L)
  • 1367-4811
OpenAlex
W2126398084
Cited by
721
References
6
FWCI
6.96
Type
journal article
Language
en
Open access
hybrid

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CoChat. (2026). Citation check: Testing significance relative to a fold-change threshold is a TREAT. https://app.cochat.ai/papers/10.1093/bioinformatics/btp053
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McCarthy, D. J., & Smyth, G. K. (2009). Testing significance relative to a fold-change threshold is a TREAT. Bioinformatics. https://doi.org/10.1093/bioinformatics/btp053

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