Vitamin D Deficiency Is Associated With Retinopathy in Children and Adolescents With Type 1 Diabetes

June 2011
Diabetes Care;Jun2011, Vol. 34 Issue 6, p1400
Academic Journal
OBJECTIVE--To examine the hypothesis that vitamin D deficiency (VDD) is associated with an increased prevalence of microvascular complications in young people with type 1 diabetes. RESEARCH DESIGN AND METHODS--In a cross-sectional study of 517 patients, 25-hydroxyvitamin D was measured. Retinopathy was assessed by 7-field stereoscopic retinal photography, peripheral neuropathy by thermal and vibration threshold testing, and microalbuminuria by albumin excretion rate or albumin-to-creatinine ratio. RESULTS--Retinopathy prevalence was higher in cases with VDD versus sufficiency (18 vs. 9%, P = 0.02); deficiency was not associated with microalbuminuria or neuropathy. In logistic regression, retinopathy was associated with VDD (odds ratio 2.12 [95% CI 1.03-4.33]), diabetes duration (1.13, 1.05-1.23), and HbA1c (1.24, 1.02-1.50). CONCLUSIONS--VDD is associated with an increased prevalence of retinopathy in young people with type 1 diabetes. The inflammatory and angiogenic effects of VDD may contribute to early retinal vascular damage; however, further investigations are warranted.


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