TITLE

THE PREVALENCE OF BIOCHEMICAL ABNORMALITIES OF CHRONIC KIDNEY DISEASE. MINERAL AND BONE DISORDERS IN UNTREATED NON-DIALYSIS PATIENTS - A MULTICENTER STUDY

AUTHOR(S)
Căpușă, C.; Chirculescu, B.; Vladu, I.; Viaşu, L.; Lipan, M.; Moţa, E.; Mircescu, G.
PUB. DATE
July 2016
SOURCE
Acta Endocrinologica (1841-0987);Jul-Sep2016, Vol. 12 Issue 3, p282
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
Background. There are scarce data about prevalence of mineral metabolism (MM) disorders in Romanian predialysis patients, so we assessed their occurrence and relationships in mild to severe chronic kidney disease (CKD). Methods. One hundred fifteen non-dialysis CKD (eGFR 31, 95% CI 29-35mL/min) and 33 matched non-CKD subjects entered this multicentric, cross-sectional study. Serum 25-hydroxyvitamin D (25OHD), intact parathyroid hormone (iPTH), phosphate (PO4), total calcium (tCa) and alkaline phosphatase (AP) were measured, along with demographic and past medical history data. Results. Hypovitaminosis D was equally prevalent in Controls and CKD (91% vs. 96% had 25OHD<30ng/mL). Increasing proportions of hyperparathyroidism (33% - stage 2 to 100% - stage 5; p<0.001) and hyperphosphatemia (2% - stage 3 to 38% - stage 5; p<0.001) were found. Hypocalcemia was more prevalent in stage 5 (25% vs. 6% in stage 4, none in stage 3 and Controls, p<0.001). Mineral metabolism parameters correlated with eGFR. In addition, iPTH was directly associated with PO4, AP, and urinary albumin-tocreatinine ratio (ACR), but inversely with tCa and 25OHD, while negative correlation of 25OHD with age, AP, ACR, and C-reactive protein emerged. In multiple regression, eGFR was the only predictor of iPTH (Beta -0.68, 95%CI -1.35 to -0.90, R2 0.46, p<0.001), whereas age and ACR were the determinants of 25OHD (a model which explained 14% of its variation). Conclusions. Hypovitaminosis D was very common irrespective of CKD presence and severity, and it seems worsened by older age and higher albuminuria. Hyperparathyroidism preceded hyperphosphatemia and hypocalcemia, and it seems mostly dependent on kidney function decline.
ACCESSION #
119125132

 

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