High prevalence of vitamin D deficiency and correlation with cystatin-C and other cardiovascular and renal risk biomarkers in patients with type 2 diabetes mellitus complicated with hypertension.

25-OHD was not correlated with cardiovascular risk biomarkers but it was correlated with renal biomarkers including urea, creatinine and eGFR. Cystatin-C and 25-OHD were not correlated to each other but both were correlated to renal function. Obesity was a significant predictor of hypertension.