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    25 - Hydroxyvitamin D Status in Type 1 Diabetic Adults and its Relationship with Glycemic Control
    (2024) Andac, Burak; Bulbul, Buket Yılmaz; Tezel, Mehmet Ogulcan; Okur, Mine; Colak, Serpil Yanık; Ekıcı, Buse; Celık, Mehmet
    Objective: To assess the vitamin D levels between adults with type 1 diabetes mellitus and the healthy control group and evaluate the relationship between HbA1c levels and vitamin D status in the diabetic group. Material and Methods: Our cross-sectional, descriptive study included 98 type 1 diabetic patients over 18 years old who applied to the Endocrinology Outpatient Clinic and 95 age- and sex-matched individuals without chronic disease. Patients with advanced renal or liver disorders, primary hyperparathyroidism, metabolic bone disorders, or using medications that might change vitamin D concentrations were excluded from the study. HbA1c and 25(OH) Vitamin-D3 levels were measured three times in nine months, and the average of the measurements was used. Diabetic patients and control individuals were separated into three groups according to their vitamin D levels as follows: deficiency (<12 ng/ml), insufficiency (12-20 ng/ml), and sufficiency (> 20 ng/ml). Results: Serum 25 (OH) vitamin D levels of diabetic patients were significantly lower than in healthy individuals (p=0.024). However, when diabetic adults were separated into three groups according to 25(OH) vitamin D levels, there was no significant difference regarding HbA1c levels (p=0.905). Conclusion: Although preclinical data support the role of low serum vitamin D levels in the etiopathogenesis of type 1 diabetes mellitus, studies examining the connection between low serum vitamin D levels and the prevalence of type 1 diabetes or glycemic control are not sufficient to reach a clear conclusion, including our study.