Results 21 to 30 of about 72,268 (331)

Meta‐analysis andMendelianrandomization: A review [PDF]

Research Synthesis Methods, 2019
Mendelian randomization (MR) uses genetic variants as instrumental variables to infer whether a risk factor causally affects a health outcome. Meta‐analysis has been used historically in MR to combine results from separate epidemiological studies, with each study using a small but select group of genetic variants.
Bowden, J, Holmes, MV
openaire   +5 more sources

MendelianRandomization v0.5.0: updates to an R package for performing Mendelian randomization analyses using summarized data [version 2; peer review: 1 approved, 2 approved with reservations]

Wellcome Open Research, 2020
The MendelianRandomization package is a software package written for the R software environment that implements methods for Mendelian randomization based on summarized data. In this manuscript, we describe functions that have been added to the package or
Jim R. Broadbent, Christopher N. Foley, Andrew J. Grant, Amy M. Mason, James R. Staley, Stephen Burgess   +5 more
doaj   +1 more source

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, Xiao Sun, Zhijie Huang, Ruiyuan Zhang, Changwei Li, Amanda H. Anderson, James P. Lash, Tanika N. Kelly   +7 more
doaj   +1 more source

Graphical analysis for phenome-wide causal discovery in genotyped population-scale biobanks

Nature Communications, 2021
Mendelian randomization is a popular method to detect causal relationships between traits, but can be confounded by instances of horizontal pleiotropy. Here, the authors present a Mendelian randomization workflow which includes causal discovery analysis ...
David Amar, Nasa Sinnott-Armstrong, Euan A. Ashley, Manuel A. Rivas   +3 more
doaj   +1 more source

Mendelian Randomization Analysis in Observational Epidemiology

Journal of Lipid and Atherosclerosis, 2019
Mendelian randomization (MR) in epidemiology is the use of genetic variants as instrumental variables (IVs) in non-experimental design to make causality of a modifiable exposure on an outcome or disease. It assesses the causal effect between risk factor and a clinical outcome.
Kwan Lee, Chi-Yeon Lim
openaire   +2 more sources

Survivor bias in Mendelian randomization analysis

Biostatistics, 2017
Mendelian randomization studies employ genotypes as experimental handles to infer the effect of genetically modified exposures (e.g. vitamin D exposure) on disease outcomes (e.g. mortality). The statistical analysis of these studies makes use of the standard instrumental variables framework.
Vansteelandt, Stijn, Dukes, Oliver, Martinussen, Torben   +2 more
openaire   +3 more sources

Metabolomic Profiling of Statin Use and Genetic Inhibition of HMG-CoA Reductase [PDF]

, 2015
Background Statins are first-line therapy for cardiovascular disease prevention, but their systemic effects across lipoprotein subclasses, fatty acids, and circulating metabolites remain incompletely characterized.
Ala-Korpela, M, Casas, J-P, Chaturvedi, N, Fatemifar, G, Hingorani, AD, Hughes, AD, Jarvelin, M-R, Kahonen, M, Kangas, AJ, Kettunen, J, Kivimaki, M, Lawlor, DA, Lehtimaki, T, Mantyselka, P, Perola, M, Raitakari, OT, Salomaa, V, Sattar, N, Smith, GD, Soininen, P, Tiainen, M, Tillin, T, Tynkkynen, T, Vanhala, M, Wang, Q, Wurtz, P   +25 more
core   +2 more sources

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, Zhang Hongmei, Ogbuanu Ikechukwu U   +2 more
doaj   +1 more source

Causal effects of physical activity on the risk of overall ovarian cancer: A Mendelian randomization study

Digital Health, 2023
Objective Inconsistent results were reported on the association of physical activity with ovarian cancer. However, given the limitations of confounders and inverse causation, the validity of the association remained unclear. Therefore, we conducted a two-
Jing Wang, Huanling Zhao, Jiahao Zhu, Minmin Jiang   +3 more
doaj   +1 more source

Causal relevance of blood lipid fractions in the development of carotid atherosclerosis: Mendelian randomization analysis. [PDF]

, 2013
BACKGROUND: Carotid intima-media thickness (CIMT), a subclinical measure of atherosclerosis, is associated with risk of coronary heart disease events. Statins reduce progression of CIMT and coronary heart disease risk in proportion to the reduction in ...
Baldassarre, Damiano, Casas, Juan-Pablo, de Faire, Ulf, Deanfield, John, Drenos, Fotios, Gertow, Karl, Gigante, Bruna, Hamsten, Anders, Hingorani, Aroon D, Holmes, Michael V, Humphries, Steve E, Kivimaki, Mika, Kumari, Meena, Langenberg, Claudia, Sennblad, Bengt, Shah, Sonia, Strawbridge, Rona J, Swerdlow, Daniel I, Talmud, Philippa J, Tremoli, Elena, Veglia, Fabrizio, Wareham, Nick, Whittaker, John   +22 more
core   +1 more source