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Exploring the causal factor effects of hypothyroidism on ischemic stroke: a two-sample Mendelian randomization study
Yi Tian1, Xiao Qin Shi1, Jing Wen Shui1
1School of Clinical Medicine, Chengdu University of Traditional Chinese Medicine, Chengdu, China.
Frontiers in Neurology
|February 16, 2024
Summary
This study found a causal link between hypothyroidism and an increased risk of ischemic stroke. These findings suggest hypothyroidism may be a significant risk factor for stroke, warranting further investigation.
Area of Science:
- Genetics
- Epidemiology
- Endocrinology
Background:
- Observational studies suggest a link between hypothyroidism and increased ischemic stroke risk.
- A definitive causal relationship has not been established.
Purpose of the Study:
- To investigate the potential causal relationship between hypothyroidism and ischemic stroke using a two-sample Mendelian randomization approach.
Main Methods:
- Utilized genetic data from FinnGens and UK Biobank (European descent).
- Performed two-sample Mendelian randomization (MR) analyses.
- Conducted a meta-analysis of MR results using a random-effects model.
Main Results:
- Consistent evidence across five analyses indicated a positive causal relationship between hypothyroidism and ischemic stroke.
- The meta-analysis result was 2.24 (1.18-4.26), p=0.025.
- No significant heterogeneity or horizontal pleiotropy was detected.
Conclusions:
- The study provides evidence supporting a causal link between hypothyroidism and ischemic stroke.
- Hypothyroidism may be a modifiable risk factor for ischemic stroke.
- Further research is needed to understand the underlying biological mechanisms.
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