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Circulating Vitamin D Concentrations and Risk of Atrial Fibrillation: A Mendelian Randomization Study Using
Nan Zhang1, Yueying Wang1, Ziliang Chen1
1Tianjin Key Laboratory of Ionic-Molecular Function of Cardiovascular Disease, Department of Cardiology, Tianjin Institute of Cardiology, Second Hospital of Tianjin Medical University, Tianjin, China.
Frontiers in Nutrition
|July 5, 2022
Summary
This study found no causal link between vitamin D levels and atrial fibrillation (AF) risk. Mendelian randomization analysis indicates that higher vitamin D concentrations do not increase the likelihood of developing AF.
Area of Science:
- Cardiovascular Epidemiology
- Nutritional Science
- Genetic Epidemiology
Background:
- Observational studies suggest a link between vitamin D deficiency and atrial fibrillation (AF), but causality remains uncertain.
- Vitamin D deficiency is a prevalent health concern globally.
- Understanding the relationship between vitamin D and AF is crucial for public health.
Purpose of the Study:
- To investigate the potential causal association between serum 25-hydroxyvitamin D [25(OH)D] concentrations and the risk of atrial fibrillation (AF).
- To utilize Mendelian randomization (MR) to address confounding factors present in observational studies.
- To provide robust evidence regarding vitamin D's role in AF etiology.
Main Methods:
- A Mendelian randomization (MR) analysis was conducted using summary statistics from large genome-wide association studies.
- Instrumental variables comprised six single-nucleotide polymorphisms (SNPs) strongly associated with serum 25(OH)D levels.
- Inverse variance weighted (IVW) methods (fixed and random effects) were employed to estimate the causal effect.
Main Results:
- The MR analysis revealed no statistically significant evidence supporting a causal association between genetically predicted circulating 25(OH)D concentrations and the risk of AF.
- The odds ratio for AF per unit increase in log 25(OH)D was approximately 1.003, with wide confidence intervals and non-significant p-values.
- Sensitivity analyses confirmed the robustness of these findings, with no significant heterogeneity or directional pleiotropy detected.
Conclusions:
- Genetically predicted vitamin D concentrations are not causally associated with an increased risk of atrial fibrillation in the general population.
- Further research, potentially employing non-linear designs and focusing on vitamin D deficient individuals, is warranted.
- These findings contribute to clarifying the etiological role of vitamin D in cardiovascular health.
Keywords:
Mendelian randomizationatrial fibrillationcausal associationsingle-nucleotide polymorphismsvitamin DMore Related Videos
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