Mineral and bone disease pattern in elderly haemodialysis patients.
BACKGROUND
Although many studies have recently addressed the mineral and bone disorder of chronic kidney disease (CKD-MBD), only limited information is available for elderly dialysis patients.


METHODS
We prospectively collected serum phosphorus, calcium, parathyroid hormone (PTH), 25(OH) vitamin D, albumin, C-reactive protein, protein intake and CKD-MBD treatments in 9169 maintenance haemodialysis patients in France in June 2008. We then compared biological and treatment patterns in 3403 patients aged 75 or over to their younger counterparts.


RESULTS
Elderly patients exhibited lower serum phosphorus and parathyroid hormone concentrations (-8 and -18%, respectively) but slightly higher corrected serum calcium levels (+2%) compared to patients aged below 75 years. Elderly patients had higher mean C-reactive protein, lower serum albumin levels and reduced protein intake. Calcium and non-calcium phosphate binders as well as cinacalcet usage and dosage were significantly reduced in elderly patients, with a trend towards lower active vitamin D derivatives usage. Elderly patients were better controlled according to the Kidney Disease Outcome Quality Initiative (K/DOQI) targets compared to patients aged below 75.


CONCLUSIONS
In this large 2008 cohort of elderly haemodialysis patients, it appears easier to control serum parameters of CKD-MBD as compared to younger dialysis patients. A better control of serum phosphorus was observed, with less phosphate binder and reduced cinacalcet dosage.
Université Claude Bernard Lyon I, Hospices Civils de Lyon, Department of Nephrology, Lyon, France.
Solenne
S
Pelletier
Hubert
H
Roth
Jean-Louis
JL
Bouchet
Tilman
T
Drueke
Gerard
G
London
Denis
D
Fouque
D015415:Biomarkers / Q000097:blood*; D001851:Bone Diseases, Metabolic / Q000097:blood*; D002097:C-Reactive Protein / Q000378:metabolism; D002118:Calcium / Q000097:blood; D002908:Chronic Disease; D015331:Cohort Studies; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007674:Kidney Diseases / Q000097:blood* / Q000473:pathology; D008297:Male; D010281:Parathyroid Hormone / Q000097:blood; D010758:Phosphorus / Q000097:blood; D011379:Prognosis; D011446:Prospective Studies; D006435:Renal Dialysis / Q000379:methods*; D014807:Vitamin D / Q000097:blood
D015415:Biomarkers; D010281:Parathyroid Hormone; D014807:Vitamin D; D010758:Phosphorus; D002097:C-Reactive Protein; D002118:Calcium