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Mendelian randomization in family data [PDF]
BMC Proceedings, 2009 The phrase "mendelian randomization" has become associated with the use of genetic polymorphisms to uncover causal relationships between phenotypic variables. The statistical methods useful in mendelian randomization are known as instrumental variable techniques.
Nathan Morris +3 more
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Effects of epigenetic age acceleration on kidney function: a Mendelian randomization study
Clinical Epigenetics, 2023 Background Previous studies have reported cross-sectional associations between measures of epigenetic age acceleration (EAA) and kidney function phenotypes. However, the temporal and potentially causal relationships between these variables remain unclear.
Yang Pan +7 more
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Nature Genetics, 2018 Horizontal pleiotropy occurs when the variant has an effect on disease outside of its effect on the exposure in Mendelian randomization (MR). Violation of the ‘no horizontal pleiotropy’ assumption can cause severe bias in MR.
M. Verbanck +3 more
semanticscholar +1 more source
Can we apply the Mendelian randomization methodology without considering epigenetic effects?
Emerging Themes in Epidemiology, 2009 Introduction Instrumental variable (IV) methods have been used in econometrics for several decades now, but have only recently been introduced into the epidemiologic research frameworks.
Karmaus Wilfried +2 more
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Nature Communications, 2021 Mendelian Randomization approaches are being increasingly refined, but certain statistical limitations hinder their application to GWAS. Here, the authors propose a new Mendelian Randomization method to estimate bi- directional causal effects and ...
Liza Darrous +2 more
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Statistical methods for Mendelian randomization in genome-wide association studies: A review
Computational and Structural Biotechnology Journal, 2022 Genome-wide association studies have yielded thousands of associations for many common diseases and disease-related complex traits. The identified associations made it possible to identify the causal risk factors underlying diseases and investigate the ...
Frederick J. Boehm, Xiang Zhou
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Genetic Epidemiology, 2016 Developments in genome‐wide association studies and the increasing availability of summary genetic association data have made application of Mendelian randomization relatively straightforward.
J. Bowden +3 more
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Methodological Challenges in Mendelian Randomization [PDF]
Epidemiology, 2014 We give critical attention to the assumptions underlying Mendelian randomization analysis and their biological plausibility. Several scenarios violating the Mendelian randomization assumptions are described, including settings with inadequate phenotype definition, the setting of time-varying exposures, the presence of gene-environment interaction, the ...
Tyler J. VanderWeele +3 more
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International Journal of Epidemiology, 2015 Background: The number of Mendelian randomization analyses including large numbers of genetic variants is rapidly increasing. This is due to the proliferation of genome-wide association studies, and the desire to obtain more precise estimates of causal ...
J. Bowden, G. Davey Smith, S. Burgess
semanticscholar +1 more source
BMC Medicine, 2022 Background Several recent observational studies have reported that gut microbiota composition is associated with preeclampsia. However, the causal effect of gut microbiota on preeclampsia-eclampsia is unknown. Methods A two-sample Mendelian randomization
Pengsheng Li +8 more
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