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Stroke incidence not associated with low Vitamin D (but stroke outcome is) – Aug 2019

Vitamin D Status and Risk of Stroke -The Rotterdam Study

Stroke. 2019;50:2293–2298, https://doi.org/10.1161/STROKEAHA.119.025449
Brian P. Berghout , Lana Fani , Alis Heshmatollah , Peter J. Koudstaal , M. Arfan Ikram , M. Carola Zillikens , M. Kamran Ikram

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Background and Purpose—
Recent findings suggest that vitamin D, a neuroprotective prohormone, is involved in the pathogenesis of cardiovascular disease. However, previous studies investigating the association between vitamin D and stroke have shown inconsistent findings. In view of these discrepancies, we determined the association of vitamin D status with stroke using data from a population-based study.

Methods—
Within the RS (Rotterdam Study), an ongoing prospective population-based study, we measured serum 25-hydroxyvitamin D concentrations between 1997 and 2008 in 9680 participants (56.8% women) aged ≥45 years. We assessed a history of stroke at baseline and subsequently followed for incident stroke until January 1, 2016. Regression models were used to investigate the association of serum 25-hydroxyvitamin D with prevalent and incident stroke separately, adjusted for age, sex, study cohort, season of blood sampling, and other cardiovascular risk factors.

Results—
Of 9680 participants, 339 had a history of stroke at baseline. Serum 25-hydroxyvitamin D concentration was associated with prevalent stroke, adjusted odds ratio per SD decrease, 1.31; 95% CI, 1.14–1.51. After excluding participants with prevalent stroke, we followed 9338 participants for a total of 98 529 person-years. During follow-up, 735 participants developed a stroke. Lower serum 25-hydroxyvitamin D concentration was not associated with a higher stroke risk, adjusted hazard ratio per SD decrease, 1.06; 95% CI, 0.97–1.16. However, severe vitamin D deficiency did show a significant association: hazard ratio, 1.25; 95% CI, 1.05–1.50.

Conclusions—
In this population-based cohort, we found an association between vitamin D and prevalent stroke. Only severe vitamin D deficiency was associated with incident stroke. This suggests that lower vitamin D levels do not lead to a higher stroke risk but are instead a consequence of stroke

Created by admin. Last Modification: Monday November 11, 2019 17:01:34 GMT-0000 by admin. (Version 5)

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ID Name Comment Uploaded Size Downloads
12557 stroke incidence.pdf admin 28 Aug, 2019 14:48 313.57 Kb 26
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