Related Experiment Videos
Association Between Socioeconomic Status and Atrial Fibrillation: A Two-Sample Mendelian Randomization Study
Shangcai Xie1, Xia Zhao1, Menghui Mao1
1Department of Cardiology, The Second Affiliated Hospital of Jiaxing University, Jiaxing, Zhejiang, China.
Summary
Higher educational attainment (EA) is causally linked to a reduced risk of atrial fibrillation (AF). This Mendelian randomization study found no significant causal association between socioeconomic deprivation (TDI) or household income and AF risk.
Area of Science:
- Genetics and Epidemiology
- Cardiovascular Disease Research
- Socioeconomic Determinants of Health
Background:
- Lower socioeconomic status (SES), encompassing socioeconomic deprivation, income, and educational attainment (EA), is correlated with an increased risk of atrial fibrillation (AF).
- Existing observational studies suggest a link between SES and AF, but causal relationships remain unclear.
Purpose of the Study:
- To investigate the potential causal influence of socioeconomic status (SES) on the risk of developing atrial fibrillation (AF).
- To differentiate the causal effects of specific SES indicators—Townsend deprivation index (TDI), household income, and educational attainment (EA)—on AF risk.
Main Methods:
- Employed a two-sample Mendelian randomization (MR) design utilizing large-scale genetic data from UK Biobank, Social Science Genetic Association Consortium, FinnGen, and a comprehensive meta-analysis.
- Selected single-nucleotide polymorphisms (SNPs) as instrumental variables for genetically proxied TDI, household income, and EA.
- Assessed causal associations between genetically proxied SES indicators and AF risk, with rigorous sensitivity analyses to ensure validity.
Main Results:
- No significant causal association was observed between genetically proxied socioeconomic deprivation (TDI) and AF risk in either the FinnGen or Nielsen et al. datasets.
- Genetically proxied household income did not show a statistically significant association with AF risk across the analyzed datasets.
- Higher genetically proxied educational attainment (EA) was significantly associated with a reduced risk of AF in both the FinnGen and Nielsen et al. datasets.
Conclusions:
- The study provides evidence that higher educational attainment (EA) causally reduces the risk of atrial fibrillation (AF).
- No evidence of a causal relationship was found between socioeconomic deprivation (TDI) or household income and the risk of AF.
- Findings highlight EA as a potential protective factor against AF, suggesting avenues for public health interventions targeting educational disparities.