Results 111 to 120 of about 81,479 (293)

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

Systemic and Local Adiposity in the Bone Marrow Microenvironment Associated With Improved Prognosis in Hodgkin Lymphoma: Imaging and Molecular Analysis

International Journal of Cancer, EarlyView.
Schematic overview of systemic and bone marrow‐specific adiposity in Hodgkin Lymphoma (HL). Body Mass Index was associated with bone marrow (BM) involvement, relapse, and mortality (1). In contrast, increased yellow marrow density was associated with poorer prognosis (2).
Andreia Matos, William P. Cawthorn, Joana Marinho‐Dias, Sofia Ramalheira, Susana Roncon, Dulcineia Pereira, Teresa Ribeiro, Carla Rodrigues, Mário Mariz, Ana Miranda, Helena Brízido, Manuel Bicho, Pedro Medeiros, Ana Carneiro, Fernanda Trigo, Pingzhao Hu, Flávia Pereira, Hugo Duarte, Calum D. Gray, Tom Macgillivray, Alan G. Ramsay, Maria J. Oliveira, Ricardo Ribeiro   +22 more
wiley   +1 more source

Causal association of plasminogen activators and their inhibitors with Alzheimer’s disease: a Mendelian randomization study

Archives of Medical Science
Introduction Alzheimer’s disease (AD) is the most common cause of dementia and contributes to a huge burden of disease worldwide. Observational studies have found that tissue plasminogen activator (t-PA) inhibits the development of AD, but little is ...
Xin Guo, Fangyu Gao, Baolong Pan, Feng Gao, Jingsi Zhang, Shanshan Wang, Qiao Niu   +6 more
doaj   +1 more source

Assumptions of IV Methods for Observational Epidemiology

, 2010
Instrumental variable (IV) methods are becoming increasingly popular as they seem to offer the only viable way to overcome the problem of unobserved confounding in observational studies.
Didelez, Vanessa, Meng, Sha, Sheehan, Nuala A.   +2 more
core   +1 more source

Derivation and Validation of a Predictive Model for Advanced Colorectal Neoplasia Among Average‐Risk Adults in China

International Journal of Cancer, EarlyView.
Efficient pre‐colonoscopy risk stratification tools are needed, especially in China. Using multicenter colorectal cancer screening data from Shandong Province, the authors developed and validated a risk prediction model for advanced colorectal neoplasia in asymptomatic individuals using sociodemographic characteristics, lifestyle factors, and medical ...
Yan Liu, Yanxiu Liu, Yukun Feng, Boyu Liu, Wenxuan Yan, Nan Zhang, Youhua Lu   +6 more
wiley   +1 more source

Can Omega-3 prevent the accidence of stroke: a mendelian randomization study

Hereditas
Background The lipid-lowering effects of Omega-3 fatty acids have been widely reported, yet their impact on ischemic stroke remains controversial. Reports on the protective effects of unsaturated fatty acids, such as Omega-6 and Omega-7, as well as ...
Chongcheng Xi, Jie Zhang, Haihui Liu, Sian Tao, Ying Xie, Jibin Liu, Changqing Tong, Dong Tian, Hua Ye, Xiaobo Zhang   +9 more
doaj   +1 more source

The mitochondrial DNA copy number and ovary‐related reproductive disorders: A bidirectional two‐sample Mendelian randomization study

International Journal of Gynecology &Obstetrics, Volume 169, Issue 1, Page 112-120, April 2025.
Abstract Objective In the present study, a bidirectional two‐sample Mendelian randomization approach was utilized to explore potential causal relationships between mitochondrial DNA copy number (mtDNA‐CN) and ovary‐related reproductive disorders (ORRDs), including ovarian dysfunction, ovarian cyst, polycystic ovary syndrome (PCOS), premature ovarian ...
Ke Peng, Xiao Han, Congquan Wu, Qiaowen Lu, Shujun Gao   +4 more
wiley   +1 more source

Outlier Detection in Mendelian Randomization

Statistics in Medicine
ABSTRACT Mendelian randomization (MR) uses genetic variants as instrumental variables to infer causal effects of exposures on an outcome. One key assumption of MR is that the genetic variants used as instrumental variables are independent of the outcome conditional on the risk factor and unobserved confounders.
Maximilian M. Mandl, Anne‐Laure Boulesteix, Stephen Burgess, Verena Zuber   +3 more
openaire   +3 more sources

Causal effects of reproductive traits on cognitive function: A two‐sample and multivariable mendelian randomization study

International Journal of Gynecology &Obstetrics, EarlyView.
Abstract Objective Potential associations between reproductive traits and cognitive function have been discovered; however, the results are inconsistent, and the causalities are unclear. This study utilized Mendelian randomization (MR) analysis to assess the causal impact of reproductive traits on cognitive function.
Xia Wang, Yunyun Guo
wiley   +1 more source

Progress of metabolomics‐centric multi‐omics research in medicine

iMetaOmics, EarlyView.
The graphical abstract illustrates a holistic roadmap for metabolomics‐centric multi‐omics integration in medical research. The upper panel depicts the technological transition from traditional bulk analysis to high‐resolution single‐cell and spatial methodologies, specifically addressing inherent challenges such as molecular complexity and dynamic ...
Ziyi Wang, Shiwen Deng, Xiaoxu Wang, Xiao Chang, Na Guo, Peng Chen, Hongjun Yang   +6 more
wiley   +1 more source