A threshold value of estimated glomerular filtration rate that predicts changes in serum 25-hydroxyvitamin D levels: 4th Korean National Health and Nutritional Examination Survey 2008

Abstract

Although moderate renal dysfunction (eGFR < 45 mL/min/1.73 m(2)) is an important predictor of vitamin D deficiency, serum 25OHD levels start to decrease below an eGFR level of ~60 mL/min/1.73 m(2) independent of other risk factors. These results suggest that more careful attention to 25OHD levels may be needed when patients reach Stage 3 CKD.