Associations Between Vitamin D and Microvascular Complications in Middle-Aged And Elderly Diabetic Patients |
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| Institution: | 1. *Contributed equally to this work.;3. 2;1. From Division of Endocrinology and Diabetes, John H. Stroger, Jr. Hospital of Cook County, and Rush University Medical Center, Chicago, Illinois;2. Division of Endocrinology and Metabolism, Department of Medicine, Indiana University School of Medicine, Chicago, Illinois;3. Department of Internal Medicine, John H. Stroger, Jr. Hospital of Cook County, Chicago, Illinois;4. Department of Biostatistics, Rush University Medical Center, Chicago, Illinois.;1. Department of Medicine, St. Vincent''s Medical Center, Bridgeport, Connecticut;2. The Frank H. Netter MD School of Medicine at Quinnipiac University, North Haven, Connecticut;3. Department of Radiology, St. Vincent''s Medical Center, Bridgeport, Connecticut;4. Department of Medical Sciences, The Frank H. Netter MD School of Medicine at Quinnipiac University, North Haven, Connecticut |
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| Abstract: | Objective: The objective of this cross-sectional study was to investigate the association of serum 25-hydroxyvitamin D (25[OH]D) levels with estimated glomerular filtration rate (eGFR), albumin/creatinine ratio (ACR), and the prevalence of diabetic retinopathy (DR) in Chinese diabetic adults.Methods: A total of 4,767 diabetic participants were enrolled from seven communities in Shanghai, China, in 2018. Participants underwent several examinations, which included the measurement of anthropometric parameters, blood pressure, glucose, lipid profiles, 25(OH)D, and ACR. DR was detected based on high-quality fundus photographs and remotely read by ophthalmologists.Results: Compared with the first 25(OH)D quartile, participants in the fourth quartile had a lower prevalence of high ACR (odds ratio [OR], 0.77; 95% confidence interval [CI], 0.61 to 0.96) (P for trend <.01). No association was found between 25(OH)D levels and eGFR. For DR, the OR (95% CI) for DR ranging from 0 to 4 in ordinal logistic regression associated with 25(OH)D was 0.62 (0.47 to 0.82) for the fourth 25(OH)D quartile (P for trend <.01) compared with the first quartile. These associations were all fully adjusted for confounding factors.Conclusion: Lower serum 25(OH)D concentration is significantly associated with increased ACR and higher prevalence of DR in middle-aged and elderly diabetic adults. However, the possibility of a causal relationship between 25(OH)D deficiency and diabetic microvascular complications remains to be demonstrated.Abbreviations: 25(OH)D = 25-hydroxyvitamin D; ACR = albumin/creatinine ratio; BMI = body mass index; CI = confidence interval; DKD = diabetic kidney disease; DR = diabetic retinopathy; eGFR = estimated glomerular filtration rate; HbA1c = glycated hemoglobin; HDL = high-density lipoprotein; LDL = low-density lipoprotein; OR = odds ratio; T2DM = type 2 diabetes mellitus |
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