Vitamin D and Arterial Function in Patients With Chronic Kidney Disease

Inclusion Criteria

• •Age ≥ 18 years
• •Chronic kidney disease stage IIIB or IV by 4 parameter Modified Diet in Renal Diseases Formula (Estimated Glomerular Filtration Rate \[GFR\] 44-15 ml/min/1.73m2)
• •Vitamin D (D2 + D3) deficient, defined as serum 25(OH)D level \< 30 ng/mL
• •Corrected serum calcium \< 10.2 mg/dL
• •Serum phosphate \< 4.6 mg/dL
• •Serum albumin \> 3.0 g/dL
• •Body mass index \< 40 kg/m2
• •Ability to give informed consent