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Statistical Applications in Genetics and Molecular Biology

Editor-in-Chief: Sanguinetti, Guido


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1544-6115
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Volume 8, Issue 1

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Volume 1 (2002)

Modified FDR Controlling Procedure for Multi-Stage Analyses

Catherine Tuglus / Mark J. van der Laan
Published Online: 2009-02-04 | DOI: https://doi.org/10.2202/1544-6115.1397

Multiple testing has become an integral component in genomic analyses involving microarray experiments where a large number of hypotheses are tested simultaneously. However, before applying more computationally intensive methods, it is often desirable to complete an initial truncation of the variable set using a simpler and faster supervised method such as univariate regression. Once such a truncation is completed, multiple testing methods applied to any subsequent analysis no longer control the appropriate Type I error rates. Here we propose a modified marginal Benjamini & Hochberg step-up FDR controlling procedure for multi-stage analyses (FDR-MSA), which correctly controls Type I error in terms of the entire variable set when only a subset of the initial set of variables is tested. The method is presented with respect to a variable importance application. As the initial subset size increases, we observe convergence to the standard Benjamini & Hochberg step-up FDR controlling multiple testing procedures. We demonstrate the power and Type I error control through simulation and application to the Golub Leukemia data from 1999.

Keywords: false discovery rate; modified FDR; targeted maximum likelihood

About the article

Published Online: 2009-02-04


Citation Information: Statistical Applications in Genetics and Molecular Biology, Volume 8, Issue 1, Pages 1–15, ISSN (Online) 1544-6115, DOI: https://doi.org/10.2202/1544-6115.1397.

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