DOI: 10.1101/476135Nov 22, 2018Paper

Hypothesis-free analysis of deep vein thrombosis aetiology: a Mendelian randomization study

BioRxiv : the Preprint Server for Biology
Andrei-Emil ConstantinescuEmma Vincent


Background: Deep vein thrombosis (DVT) is the formation of a thrombus/clot in the deep veins, when part of this clot breaks off it can travel to the lungs, resulting in pulmonary embolism. These two conditions together are known as venous thromboembolism (VTE), a leading cause of death and disability worldwide. Despite the prevalence of VTE, we do not fully understand what causes it and it is often overlooked as a major public health problem. Confirming and identifying risk factors associated with DVT is likely to lead to a reduction in the incidence, morbidity and mortality of VTE especially where these risk factors are modifiable. We can do this, by exploiting the availability of summary genetic data from genome-wide association studies (GWAS) of numerous phenotypes, including DVT, which permits hypothesis-free causal inference. Objectives: To identify novel risk factors for DVT and to assess the causality of factors previously shown to be associated with DVT. Methods: Two-sample Mendelian randomization (MR) was performed using summarised genetic data. Inverse variance weighted (IVW) estimates were calculated and validated by additional methods more robust to horizontal pleiotropy (MR Egger, simple mode, weighted mode, and we...Continue Reading

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