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Family-based nonparametric tests of ...
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Lewinger, Juan Pablo.
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Family-based nonparametric tests of linkage and association.
紀錄類型:
書目-電子資源 : Monograph/item
正題名/作者:
Family-based nonparametric tests of linkage and association./
作者:
Lewinger, Juan Pablo.
面頁冊數:
128 p.
附註:
Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2470.
Contained By:
Dissertation Abstracts International65-05B.
標題:
Statistics. -
電子資源:
http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=NQ91648
ISBN:
0612916480
Family-based nonparametric tests of linkage and association.
Lewinger, Juan Pablo.
Family-based nonparametric tests of linkage and association.
- 128 p.
Source: Dissertation Abstracts International, Volume: 65-05, Section: B, page: 2470.
Thesis (Ph.D.)--University of Toronto (Canada), 2004.
Family-based tests of linkage that are sensitive to the presence of allelic association between a marker and disease loci have become a popular alternative to case-control based tests of allelic association. These tests can be more powerful than allele-sharing tests if the level of allelic association is high. Because they are not sensitive to allelic associations that do not occur in conjunction with linkage they are immune to the 'population stratification problem'. Many of these tests are also nonparametric tests of linkage thus providing protection against violation of assumptions commonly made in parametric linkage analysis such as random mating, Hardy-Weinberg equilibrium, monogenic disease or allelic homogeneity. The simplest and best known test of this class is the transmission disequilibrium test (TDT) introduced by Spielman et al. [47]. Since its introduction in 1993 a large number of generalizations have been proposed to address some of the TDT's original limitations. However most of these extensions discard valuable information.
ISBN: 0612916480Subjects--Topical Terms:
517247
Statistics.
Family-based nonparametric tests of linkage and association.
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Family-based tests of linkage that are sensitive to the presence of allelic association between a marker and disease loci have become a popular alternative to case-control based tests of allelic association. These tests can be more powerful than allele-sharing tests if the level of allelic association is high. Because they are not sensitive to allelic associations that do not occur in conjunction with linkage they are immune to the 'population stratification problem'. Many of these tests are also nonparametric tests of linkage thus providing protection against violation of assumptions commonly made in parametric linkage analysis such as random mating, Hardy-Weinberg equilibrium, monogenic disease or allelic homogeneity. The simplest and best known test of this class is the transmission disequilibrium test (TDT) introduced by Spielman et al. [47]. Since its introduction in 1993 a large number of generalizations have been proposed to address some of the TDT's original limitations. However most of these extensions discard valuable information.
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We propose a general framework for constructing nonparametric tests of linkage sensitive to allelic association as well as tests of allelic association in the presence of linkage. These tests make efficient use of all information available in nuclear families, including family structure, unaffected offspring, parental phenotypes, families with both parents homozygous and families with missing parental genotypes. The non-parametric property of these tests is obtained by conditioning on sufficient statistics for the hypotheses of no linkage or no allelic association, according to the framework developed by Rabinowitz et al. [37]. The test statistics are conditional likelihood ratios based on a parametric model of marker and trait data that includes allelic association, and where model parameters are estimated from the sufficient statistic under the null hypothesis in what is essentially a segregation analysis.
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The performance of an implementation of these tests based on the standard two point linkage model is evaluated through Monte Carlo simulations, and applied in a study of hypertension. We also propose easy to implement Monte Carlo methods to compute power and p-values for a large class of family-based tests of linkage and association, including the ones we proposed.
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