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024 7 _ |2 doi
|a 10.1016/j.ajhg.2018.03.021
024 7 _ |2 pmc
|a pmc:PMC5993419
024 7 _ |2 ISSN
|a 0002-9297
024 7 _ |2 ISSN
|a 1537-6605
024 7 _ |2 Handle
|a 2128/20946
024 7 _ |2 WOS
|a WOS:000434946200014
024 7 _ |2 altmetric
|a altmetric:40946680
037 _ _ |a FZJ-2018-07483
041 _ _ |a eng
082 _ _ |a 570
100 1 _ |a Ni, Guiyan
|b 0
245 _ _ |a Estimation of Genetic Correlation via Linkage Disequilibrium Score Regression and Genomic Restricted Maximum Likelihood.
260 _ _ |a New York, NY
|b Elsevier
|c 2018
336 7 _ |2 DRIVER
|a article
336 7 _ |2 DataCite
|a Output Types/Journal article
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|s 1545053056_28994
336 7 _ |2 BibTeX
|a ARTICLE
336 7 _ |2 ORCID
|a JOURNAL_ARTICLE
336 7 _ |0 0
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|a Journal Article
520 _ _ |a Genetic correlation is a key population parameter that describes the shared genetic architecture of complex traits and diseases. It can be estimated by current state-of-art methods, i.e., linkage disequilibrium score regression (LDSC) and genomic restricted maximum likelihood (GREML). The massively reduced computing burden of LDSC compared to GREML makes it an attractive tool, although the accuracy (i.e., magnitude of standard errors) of LDSC estimates has not been thoroughly studied. In simulation, we show that the accuracy of GREML is generally higher than that of LDSC. When there is genetic heterogeneity between the actual sample and reference data from which LD scores are estimated, the accuracy of LDSC decreases further. In real data analyses estimating the genetic correlation between schizophrenia (SCZ) and body mass index, we show that GREML estimates based on ∼150,000 individuals give a higher accuracy than LDSC estimates based on ∼400,000 individuals (from combined meta-data). A GREML genomic partitioning analysis reveals that the genetic correlation between SCZ and height is significantly negative for regulatory regions, which whole genome or LDSC approach has less power to detect. We conclude that LDSC estimates should be carefully interpreted as there can be uncertainty about homogeneity among combined meta-datasets. We suggest that any interesting findings from massive LDSC analysis for a large number of complex traits should be followed up, where possible, with more detailed analyses with GREML methods, even if sample sizes are lesser.
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700 1 _ |a Neale, Benjamin M
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