Estimating the effective sample size in association studies of quantitative traits.
Estimating the effective sample size in association studies of quantitative traits.
复制标题
估计定量性状的关联研究中的有效样本量。
DOI:
10.1093/g3journal/jkab057
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发表时间:
2021-06-17
期刊:
影响因子:
--
通讯作者:
Aschard H
中科院分区:
文献类型:
--
作者:
Ziyatdinov A;Kim J;Prokopenko D;Privé F;Laporte F;Loh PR;Kraft P;Aschard H
The effective sample size (ESS) is a metric used to summarize in a single term the amount of correlation in a sample. It is of particular interest when predicting the statistical power of genome-wide association studies (GWAS) based on linear mixed models. Here, we introduce an analytical form of the ESS for mixed-model GWAS of quantitative traits and relate it to empirical estimators recently proposed. Using our framework, we derived approximations of the ESS for analyses of related and unrelated samples and for both marginal genetic and gene-environment interaction tests. We conducted simulations to validate our approximations and to provide a quantitative perspective on the statistical power of various scenarios, including power loss due to family relatedness and power gains due to conditioning on the polygenic signal. Our analyses also demonstrate that the power of gene-environment interaction GWAS in related individuals strongly depends on the family structure and exposure distribution. Finally, we performed a series of mixed-model GWAS on data from the UK Biobank and confirmed the simulation results. We notably found that the expected power drop due to family relatedness in the UK Biobank is negligible.
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影响因子:
2.1
作者:
Sung, Yun Ju;Winkler, Thomas W.;Cupples, L. Adrienne
通讯作者:
Cupples, L. Adrienne
DOI:
10.1093/bioinformatics/bty185
发表时间:
2018-08-15
期刊:
Bioinformatics (Oxford, England)
影响因子:
--
作者:
Privé F;Aschard H;Ziyatdinov A;Blum MGB
通讯作者:
Blum MGB
影响因子:
64.8
作者:
Bycroft C;Freeman C;Petkova D;Band G;Elliott LT;Sharp K;Motyer A;Vukcevic D;Delaneau O;O'Connell J;Cortes A;Welsh S;Young A;Effingham M;McVean G;Leslie S;Allen N;Donnelly P;Marchini J
通讯作者:
Marchini J
影响因子:
30.8
作者:
Bulik-Sullivan, Brendan K.;Loh, Po-Ru;Finucane, Hilary K.;Ripke, Stephan;Yang, Jian;Patterson, Nick;Daly, Mark J.;Price, Alkes L.;Neale, Benjamin M.
通讯作者:
Neale, Benjamin M.
影响因子:
30.8
作者:
Finucane HK;Reshef YA;Anttila V;Slowikowski K;Gusev A;Byrnes A;Gazal S;Loh PR;Lareau C;Shoresh N;Genovese G;Saunders A;Macosko E;Pollack S;Brainstorm Consortium;Perry JRB;Buenrostro JD;Bernstein BE;Raychaudhuri S;McCarroll S;Neale BM;Price AL
通讯作者:
Price AL