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  • Title: Effect of darbepoetin alfa administered once monthly on maintaining hemoglobin levels in older patients with chronic kidney disease.
    Author: Silver MR, Agarwal A, Krause M, Lei L, Stehman-Breen C.
    Journal: Am J Geriatr Pharmacother; 2008 Jun; 6(2):49-60. PubMed ID: 18675764.
    Abstract:
    BACKGROUND: The anemia of chronic kidney disease (CKD) is associated with increased hospitalizations, increased cardiovascular morbidity and mortality, and diminished quality of life in the elderly. Darbepoetin alfa is an erythropoiesis-stimulating agent that has been shown to be effective in treating anemia in patients with CKD (but not on dialysis) when administered using extended-dosing regimens. OBJECTIVE: The purpose of this post hoc analysis was to examine the efficacy and safety profile of once-monthly (QM) darbepoetin alfa in study patients stratified according to age (ie, <65, 65-74, and > or =75 years). METHODS: Patients with CKD but not on dialysis, receiving darbepoetin alfa every other week (Q2W), and with stable hemoglobin (Hb) levels between 11 and 13 g/dL, inclusive, were enrolled in this 33-week, multicenter, open-label, single-arm study. The study was carried out at 36 US centers and consisted of a 24-week QM darbepoetin alfa dose-titration period followed by an 8-week evaluation period. Hb levels were measured Q2W. Study results were stratified according to patient age (<65, 65-74, and > or =75 years). RESULTS: A total of 152 patients (79 women, 73 men) were enrolled; 55 patients (36%) were <65 years of age, 46 (30%) were 65 to 74 years of age, and 51 (34%) were > or =75 years of age. In patients who received > or =1 dose of darbepoetin alfa, Hb levels > or =11 g/dL were maintained in 76%, 80%, and 71% of patients aged <65, 65 to 74, and > or =75 years, respectively. For patients who completed the study, the proportions who maintained Hb levels > or =11 g/dL were 83%, 88%, and 85%, respectively, for the 3 age groups. The safety profile of QM darbepoetin alfa in this study was consistent with that expected in patients with CKD not receiving dialysis. CONCLUSIONS: Darbepoetin alfa administered QM maintained Hb levels > or =11 g/dL in patients with CKD (not on dialysis) aged <65, 65 to 74, and > or =75 years. This treatment regimen may help optimize anemia management for older community-dwelling and long-term care patients.
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