Preprint Review Version 1 This version is not peer-reviewed

Vitamin D Deficiency Increases the Risk of Diabetic Retinopathy: A Meta-Analysis of Observational Studies

Version 1 : Received: 10 April 2017 / Approved: 11 April 2017 / Online: 11 April 2017 (06:16:22 CEST)

How to cite: Zhang, X.; Pan, G.; Zhang, Z.; Tao, S. Vitamin D Deficiency Increases the Risk of Diabetic Retinopathy: A Meta-Analysis of Observational Studies. Preprints 2017, 2017040059 (doi: 10.20944/preprints201704.0059.v1). Zhang, X.; Pan, G.; Zhang, Z.; Tao, S. Vitamin D Deficiency Increases the Risk of Diabetic Retinopathy: A Meta-Analysis of Observational Studies. Preprints 2017, 2017040059 (doi: 10.20944/preprints201704.0059.v1).

Abstract

Background: Diabetic retinopathy (DR) is one of the most prominent pathological microvascular complications in diabetes. A series of studies reported that vitamin D deficiency was associated with increased prevalence of retinopathy in diabetic patients but the results were inconsistent. In this study we focused on evaluating the relationship between vitamin D deficiency and DR by conducting a meta-analysis of observational studies. Methods: Systematic computerized searches were performed in PubMed, MEDLINE, and the Cochrane Library for relevant original articles till November 20, 2016. The pooled odds ratios (ORs) with corresponding confidence intervals (CIs) were calculated to assess the associated value of vitamin D deficiency to the risk of DR. 9 studies including 6332 participants were subjected to final analysis. Results: The results indicated that vitamin D deficiency increases the risk of DR (OR = 1.57, 95% CI 1.32-1.87) with a little heterogeneity (I2 = 23%). In addition, the subgroup analysis demonstrated that there were obvious heterogeneities in T2DM (I2 = 47.8%). Sensitivity analysis showed that the results were relatively stable and reliable. Conclusion: our meta-analysis demonstrated that vitamin D deficiency could increase the risk of DR.

Subject Areas

Keywords: vitamin D deficiency; diabetic retinopathy; meta-analysis.

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