4.7 Article

25-Hydroxyvitamin D level, vitamin D intake, and risk of stroke: A dose-response meta-analysis

Journal

CLINICAL NUTRITION
Volume 39, Issue 7, Pages 2025-2034

Publisher

CHURCHILL LIVINGSTONE
DOI: 10.1016/j.clnu.2019.08.029

Keywords

Stroke; Vitamin D; Meta-analysis; Cohort studies

Funding

  1. China Medical University Major Clinical Medicine Construction Project [111-3110118036]

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Background & aims: A growing number of studies have shown that vitamin D are related to the risk of stroke, however, the dose-response association between vitamin D and the risk of stroke is still unclear. Accordingly, we conducted a dose-response meta-analysis to evaluate the relationships between 25-hydroxyvitamin D [25(OH)D] level, vitamin D intake, and the risk of stroke by summarizing cohort studies. Methods: PubMed, Embase, Cochrane and the Web of Science database were searched for related studies. Cohort studies examining the influence of 25(OH)D level and vitamin D intake on stroke risk were summarized. Dose-response relationships were determined using a random-effect model. Results: Twenty cohort studies involving 217,235 participants were included. The pooled relative risk for the high-versus-low categories was 0.74 (95% CI: 0.66-0.83) for 25(OH)D level, and 0.75 (95% CI: 0.57-0.98) for vitamin D intake. In addition, there were non-linear relationships between 25(OH)D level, vitamin D intake, and stroke risk. The incidence of stroke was reduced to its lowest point, with a reduction of about 20%, when 25(OH)D level was about 50 nmol/L or vitamin D intake was about 12 mu g/day. Conclusion: 25(OH)D level and vitamin D intake were both inversely related to stroke risk, with a non-linear doseeresponse relationship. (C) 2019 Elsevier Ltd and European Society for Clinical Nutrition and Metabolism. All rights reserved.

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