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Published on: July 24, 2013
Frailty and cardiometabolic diseases: a bidirectional Mendelian randomisation study
Jiahao Zhu1, Dan Zhou2,3, Jing Wang1
1Department of Epidemiology and Health Statistics, School of Public Health, Hangzhou Medical College, Hangzhou, China.
This study used genetic data to confirm that frailty causally increases the risk of coronary artery disease, stroke, and type 2 diabetes. It also found that these cardiometabolic diseases increase frailty risk.
Area of Science:
- Gerontology
- Cardiovascular Medicine
- Endocrinology
Background:
- Frailty is linked to cardiometabolic diseases in observational studies.
- Causality of this association requires further investigation.
- Mendelian randomization (MR) can assess causal relationships using genetic variants.
Purpose of the Study:
- To investigate the causal relationship between frailty and major cardiometabolic diseases.
- To assess the bidirectional association between frailty and coronary artery disease (CAD), stroke, and type 2 diabetes (T2D).
Main Methods:
- A bidirectional Mendelian randomization (MR) study was conducted.
- Genome-wide association statistics for frailty index (FI), CAD, stroke, and T2D were analyzed.
- Inverse-variance-weighted method and sensitivity analyses were employed.
Main Results:
- Genetically predicted higher frailty index (FI) was associated with increased risk of CAD (OR 1.52) and T2D (OR 1.80).
- A suggestive association was found between higher FI and stroke risk (OR 1.36).
- Genetic liability to CAD, stroke, and T2D were all significantly associated with increased FI.
Conclusions:
- This study provides strong evidence for a bidirectional causal link between frailty and cardiometabolic diseases.
- Understanding this relationship is crucial for improving care for older adults.
- Further research can optimize interventions for frail individuals with cardiometabolic conditions.
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