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Author(s): Lopes, M
Laiginhas, R
Madeira, C
Neves, JS
Barbosa, M
Rosas, V
Carvalho, D
Falcão-Reis, F
Falcão, M
Title: Association between serum Vitamin D and diabetic retinopathy in Portuguese patients with type 1 diabetes
Publisher: Ordem dos Médicos 
Issue Date: 2020
Abstract: Introduction: Recently, vitamin D has gained importance as a diabetes risk modifier. Our aim was to assess the association between serum vitamin D levels and the prevalence of diabetic retinopathy in patients with type 1 diabetes. Material and Methods: Retrospective review of a population of patients with type 1 diabetes followed in a Portuguese tertiary center. Patients were included if they had an ophthalmological evaluation and a serum 25-hydroxyvitamin D level determination within the same year. Logistic regression analysis was used to adjust for possible confounders. Results: We included 182 patients (47% male), and 57% (n = 103) had signs of diabetic retinopathy. We found a significant association between lower circulating levels of 25-hydroxyvitamin D levels and a greater prevalence of diabetic retinopathy after adjusting for confounders (duration of diabetes, estimated glomerular filtration rate, age, sex, metabolic control, season, dyslipidemia and hypertension) (OR = 0.94; 95% CI 0.90 - 0.99, p = 0.023). Longer duration of diabetes and worse metabolic control also remained associated with diabetic retinopathy in the multivariate analysis (OR = 1.20; 95% CI 1.13 - 1.27, p < 0.001 and OR = 4.13; 95% CI 1.34 - 12.7, p = 0.013, respectively). Conclusion: Lower levels of vitamin D were associated with an increased prevalence of diabetic retinopathy in patients with type 1 diabetes, after adjusting for possible confounders. Future controlled studies may elucidate the molecular routes for this association as well as the role of supplementation in the prevention of diabetes microvascular complications.
Subject: Diabetes Mellitus
Diabetic Retinopathy
Type 1
Vitamin D
Vitamin D Deficiency
Source: Acta Medica Portuguesa, vol.33(7), p. 459-465
Document Type: Artigo em Revista Científica Nacional
Rights: openAccess
Appears in Collections:I3S - Artigo em Revista Científica Nacional

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