A Comparison of the Relationship between the Serum Level of Vitamin D and Coronary Artery Disease in Patients with Type 2 Diabetes

Cardiovascular diseases are among the most common causes of death and disability in patients with type 2 diabetes. According to some studies, Vitamin D deficiency is associated with risk of type 2 diabetes and cardiovascular diseases. The aim of this study was to compare the serum level of Vitamin D between diabetic patients with coronary artery diseases and control group. In this case-control study, patients with diabetes referred to Shahid Beheshti Hospital of Qom for coronary angiography, were divided into two groups of positive angiography (case group) and negative angiography (control group). In this study, stenosis of the lumen of at least one coronary artery more than 50% was considered as positive angiography and suffering from coronary artery disease, and stenosis lower than 50% was considered as negative angiography. Personal characteristics, biographical information, consisting of age, gender, history of hypertension, hyperlipidemia, smoking, history of coronary artery disease, and family history were recorded using a questionnaire. Venous blood samples of the patients were taken to measure the serum level of 25-hydroxy Vitamin D, and the two groups were compared in terms of Vitamin D level. The mean serum level of 25-hydroxy Vitamin D was 35.09±26.41ng/ml. Also, there was no significant difference between case and control groups. The level was 35.67±29.58ng/ml in the case group and 34.50±23.30ng/ml in control group. The level of Vitamin D in patients with cardiac disease had no significant difference. The results of this study indicated that there was no relationship between serum level of 25-hydroxy Vitamin D in type 2 diabetic patients and stenosis of coronary arteries.