Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error.

Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Research Abstract Details 

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Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Abstract Text:

Derek Gordon,Chad Haynes,Yaning Yang,Patricia L Kramer,Stephen J Finch,Derek Gordon,Chad Haynes,Yaning Yang,Patricia L Kramer,Stephen J Finch,Derek Gordon,Chad Haynes,Yaning Yang,Patricia L Kramer,Stephen J Finch,

The purpose of this work is the development of linear trend tests that allow for error (LTT ae), specifically incorporating double-sampling information on phenotypes and/or genotypes. We use a likelihood framework. Misclassification errors are estimated via double sampling. Unbiased estimates of penetrances and genotype frequencies are determined through application of the Expectation-Maximization algorithm. We perform simulation studies to evaluate false-positive rates for various genotype classification weights (recessive, dominant, additive). We compare simulated power between the LTT ae and its genotypic test equivalent, the LRT ae, in the presence of phenotype and genotype misclassification, to evaluate power gains of the LTT ae for multi-locus haplotype association with a dominant mode of inheritance. Finally, we apply LTT ae and a method without double-sample information (LTT std) to double-sampled phenotype data for an actual Alzheimer's disease (AD) case-control study with ApoE genotypes. Simulation results suggest that the LTT ae maintains correct false-positive rates in the presence of misclassification. For power simulations, the LTT ae method is at least as powerful as LRT ae method, with a maximum power gain of 0.42 over the LRT ae method for certain parameter settings. For AD data, LTT ae provides more significant evidence for association (permutation p=0.0522) than LTT std (permutation p=0.1684). This is due to observed phenotype misclassification. The LTT ae statistic enables researchers to apply linear trend tests to case-control genetic data, increasing power to detect association in the presence of misclassification. If the disease MOI is known, LTT ae methods are usually more powerful due to the fact that the statistic has fewer degrees of freedom.

Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Publishing Authors By Initials

D Gordon,C Haynes,Y Yang,PL Kramer,SJ Finch,D Gordon,C Haynes,Y Yang,PL Kramer,SJ Finch,D Gordon,C Haynes,Y Yang,PL Kramer,SJ Finch,

For similar investigative techniques: epidemiologic methods: statistics as topic research abstracts see: investigative techniques: epidemiologic methods: statistics as topic research

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Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Journal Published:

PUBLICATION TYPE: Research Support, U.S. Gov't,

Journal: Genetic epidemiology

VOLUME: 31

Page Numbers: 853-70

Journal Abbreviation: Genet. Epidemiol.

ISSN: 0741-0395

DAY: 5

MONTH: Dec

YEAR: 2007

Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Information

Number of References:

LANGUAGE: eng

NlmUniqueID: 8411723

Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Keywords Mesh Terms:

KEYWORDS: Statistics as Topic

MESH TERMS: genetics

Chemical & Substance for Abstract: Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error. Information

Substance Name: Apolipoproteins E

Registry Number: 0

Grant and Affiliation Information for Linear trend tests for case-control genetic association that incorporate random phenotype and genotype misclassification error.

AFFILIATION: Department of Genetics, Rutgers University, Piscataway, New Jersey 08854, USA. gordan@biology.rutgers.edu

Country: United States

AGENCY: United States NIA

GRANT: P30 AG008017

ACRONYM: AG

MEDLINETA: Genet Epidemiol

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