Evaluation of gene-based association tests for analyzing rare variants using Genetic Analysis Workshop 18 data

BMC Proceedings

Proceedings

Andriy Derkach¹  Lei Sun²  Jerry F Lawless³  Andrew D Paterson⁴  Daniele Merico⁵ 

[1] Department of Statistical Sciences, University of Toronto, M5S 3G3, Toronto, Ontario, Canada;Department of Statistical Sciences, University of Toronto, M5S 3G3, Toronto, Ontario, Canada;Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, M5S 3G3, Ontario, Canada;Department of Statistics and Actuarial Science, University of Waterloo, N2L 3G1, Waterloo, Ontario, Canada;Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, M5S 3G3, Ontario, Canada;Division of Biostatistics, Dalla Lana School of Public Health, University of Toronto, M5S 3G3, Ontario, Canada;Program in Genetics and Genome Biology, The Hospital for Sick Children, M5G 1X8, Toronto, Canada;The Centre for Applied Genomics, The Hospital for Sick Children, M5G 1L7, Toronto, Ontario, Canada;Program in Genetics and Genome Biology, The Hospital for Sick Children, M5G 1X8, Toronto, Canada;

关键词: Diastolic Blood Pressure;    Rare Variant;    Causal Variant;    Hypertension Status;    Genetic Analysis Workshop;   

DOI  :  10.1186/1753-6561-8-S1-S9

来源: Springer

【 摘 要 】

The focus of our work is to evaluate several recently developed pooled association tests for rare variants and assess the impact of different gene annotation methods and binning strategies on the analyses of rare variants under Genetic Analysis Workshop 18 real and simulated data settings. We considered the sample of 103 unrelated individuals with sequence data, genotypes of rare variants from chromosome 3, real phenotype of hypertension status and simulated phenotypes of systolic blood pressure (SBP) and diastolic blood pressure (DBP), and covariates of age, sex, and the interaction between age and sex. In the analysis of real phenotype data, we did not obtain significant results for any binning strategy; however, we observed a slight deviation of the p-values from the uniform distribution based on the protein-damaging variant grouping strategy. Evaluation of methods using simulated data showed lack of power even at the conservative level of 0.05 for most of the causal genes on chromosome 3. Nevertheless, analysis of MAP4 produced good power for all tests at various levels of the tests for both DBP and SBP. Our results also confirmed that Fisher's method is not only robust but can also improve power over individual pooled linear and quadratic tests and is often better than other robust tests such as SKAT-O.

【 授权许可】

Unknown   
© Derkach et al.; licensee BioMed Central Ltd. 2014. This article is published under license to BioMed Central Ltd. This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.