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BMC Proceedings

, 3:S38

First Online: 15 December 2009DOI: 10.1186-1753-6561-3-S7-S38

Cite this article as: Kang, G., Childers, D.K., Liu, N. et al. BMC Proc 2009 3Suppl 7: S38. doi:10.1186-1753-6561-3-S7-S38

Abstract

Genome-wide association studies often involve testing hundreds of thousands of single-nucleotide polymorphisms SNPs. These tests may be highly correlated because of linkage disequilibrium among SNPs. Multiple testing correction ignoring the correlation among markers, as is done in the Bonferroni procedure, can cause loss of power. Several multiple testing adjustment methods accounting for correlations among tests have been developed and have shown improved power compared to the Bonferroni procedure. These methods include a Monte Carlo MC method and a method of computing p-values adjusted for correlated tests. The objective of this study is to apply these two multiple testing methods to genome-wide association study of the Genetic Analysis Workshop 16 rheumatoid arthritis data from the North American Rheumatoid Arthritis Consortium, to compare the performance of these two methods to the Bonferroni procedure in identifying susceptibility loci underlying rheumatoid arthritis, and to discuss the strengths and weaknesses of these methods. The results show that both the MC method and p-values adjusted for correlated tests method identified more significant SNPs, thus potentially have higher power than the corresponding Bonferroni methods using the same test statistics as in the MC method and p-values adjusted for correlated tests, respectively. Simulation studies demonstrate that the MC method may have slightly higher power than the p-values adjusted for correlated tests method.

List of abbreviations usedFWERFamily-wise error rate

GAW16Genetic Analysis Workshop 16

GWASgenome-wide association studies

HWEHardy-Weinberg equilibrium

LDLinkage disequilibrium

MAFMinor allele frequency

MCMonte Carlo

NARACNorth American Rheumatoid Arthritis Consortium

p ACT p-Values adjusted for correlated tests

RARheumatoid arthritis

SNPSingle-nucleotide polymorphism.

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Autor: Guolian Kang - Douglas K Childers - Nianjun Liu - Kui Zhang - Guimin Gao

Fuente: https://link.springer.com/



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