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- W2768047105 abstract "Abstract Genome-wide association studies have shown that pleiotropy is a common phenomenon that can potentially be exploited for enhanced detection of susceptibility loci. We propose heritability informed power optimization (HIPO) for conducting powerful pleiotropic analysis using summary-level association statistics. We find optimal linear combinations of association coefficients across traits that are expected to maximize non-centrality parameter for the underlying test statistics, taking into account estimates of heritability, sample size variations and overlaps across the traits. Simulation studies show that the proposed method has correct type I error, robust to population stratification and leads to desired genome-wide enrichment of association signals. Application of the proposed method to publicly available data for three groups of genetically related traits, lipids (N=188,577) , psychiatric diseases (N case =33,332, N control =27,888) and social science traits ( N ranging between 161,460 to 298,420 across individual traits) increased the number of genome-wide significant loci by 12%, 200% and 50%, respectively, compared to those found by analysis of individual traits. Evidence of replication is present for many of these loci in subsequent larger studies for individual traits. HIPO can potentially be extended to high-dimensional phenotypes as a way of dimension reduction to maximize power for subsequent genetic association testing." @default.
- W2768047105 created "2017-11-17" @default.
- W2768047105 creator A5015067632 @default.
- W2768047105 creator A5078787100 @default.
- W2768047105 date "2017-11-12" @default.
- W2768047105 modified "2023-09-28" @default.
- W2768047105 title "Heritability Informed Power Optimization (HIPO) Leads to Enhanced Detection of Genetic Associations Across Multiple Traits" @default.
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- W2768047105 doi "https://doi.org/10.1101/218404" @default.
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