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  • Title: Guideline-practice gap in the management of predialysis chronic kidney disease mineral bone disorder in Japan.
    Author: Hamano T, Fujii N, Matsui I, Nakano C, Inoue K, Tomida K, Mikami S, Okada N, Tsubakihara Y, Rakugi H, Isaka Y.
    Journal: Ther Apher Dial; 2011 Jun; 15 Suppl 1():2-8. PubMed ID: 21595844.
    Abstract:
    No study has reported the current status of the management of chronic kidney disease mineral bone disorder (CKD-MBD) in Japan. Using the Osaka Vitamin D Study in CKD (OVIDS-CKD), we examined the prevalence of patients with serum calcium, phosphate, parathyroid hormone (PTH), or 25-hydroxyvitamin D levels outside the target of KDOQI guidelines. Eighty-four percent of the patients had 25-hydroxyvitamin D <30 ng/mL. Significant determinants of poor vitamin D status were female gender, diabetes, high PTH, and high urinary protein (2+ or greater). The percentage of patients with intact PTH higher than the target was 8% in CKD stage 3a, while between 20-22% in stages 3b to 5. The patients indicated for ergocalciferol were 7, 18, and 19% in stages 3a, 3b, and 4, respectively, and those indicated for active vitamin D were 21% in stage 5. Since neither ergocalciferol nor cholecalciferol is available in 2011 in Japan, we have no choice but to prescribe alfacalcidol or calcitriol; however, the percent of patients receiving these drugs was only 1, 4, 8, and 14% in stages 3a, 3b, 4, and 5, respectively, indicating that PTH and vitamin D status are not well controlled in Japan. In contrast, more than 80% of the patients met the target of serum calcium and phosphate. Contrary to expectations, nearly 20% of the patients had hypophosphatemia in stage 3 and 5, possibly because of strict protein restriction. Given these results, nephrologists should consider prescribing active vitamin D, especially for females and patients with diabetes, massive proteinuria, or secondary hyperparathyroidism.
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