Associations between Vitamin D Status, Supplementation, Outdoor Work and Risk of Parkinson's Disease: A Meta-Analysis Assessment - PubMed (original) (raw)

Meta-Analysis

Associations between Vitamin D Status, Supplementation, Outdoor Work and Risk of Parkinson's Disease: A Meta-Analysis Assessment

Liang Shen et al. Nutrients. 2015.

Abstract

The present study aimed to quantitatively assess the associations between vitamin D and Parkinson's Disease (PD) risks, which include: (i) risk of PD in subjects with deficient and insufficient vitamin D levels; (ii) association between vitamin D supplementation and risk of PD; and (iii) association between outdoor work and PD risk, through meta-analyzing available data. An electronic literature search supplemented by hand searching up to March 2015 identified seven eligible studies comprising 5690 PD patients and 21251 matched controls. Odds ratio (OR) and 95% confidence interval (CI) of PD risk were assessed through pooling the collected data from eligible studies using Stata software. Pooled data showed that subjects with deficient and insufficient vitamin D levels had increased PD risks compared with matched-controls according to the corresponding OR: 2.08, 95% CI: 1.63 to 2.65, and 1.29, 95% CI: 1.10 to 1.51. Vitamin D supplementation was associated with significantly reduced risk of PD (OR: 0.62, 95% CI: 0.35 to 0.90). Outdoor work was also related to reduced risk of PD (OR: 0.72, 95% CI: 0.63 to 0.81). The findings may stimulate larger, well-designed studies to further verify the associations between vitamin D and PD risk.

Keywords: Parkinson’s disease; meta-analysis; outdoor work; vitamin D.

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Figures

Figure 1

Flow diagram of literature search and identification of relevant studies.

Figure 2

Forest plots of deficient and insufficient vitamin D levels and risk of Parkinson’s Disease (PD).

Figure 3

Forest plots of vitamin D supplementation and risk of PD.

Figure 4

Forest plots of outdoor work and risk of PD.

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Associations between Vitamin D Status, Supplementation, Outdoor Work and Risk of Parkinson's Disease: A Meta-Analysis Assessment - PubMed (original) (raw)