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  • Title: Darbepoetin alfa administered every other week maintains hemoglobin levels over 52 weeks in patients with chronic kidney disease converting from once-weekly recombinant human erythropoietin: results from simplify the treatment of anemia with Aranesp (STAAR).
    Author: Hertel J, Locay H, Scarlata D, Jackson L, Prathikanti R, Audhya P.
    Journal: Am J Nephrol; 2006; 26(2):149-56. PubMed ID: 16636531.
    Abstract:
    BACKGROUND/AIM: Darbepoetin alfa, an effective treatment for anemia of chronic kidney disease (CKD), can be administered at extended intervals. Simplify the Treatment of Anemia with Aranesp (STAAR), a multicenter, 52-week study, was conducted to assess the efficacy of darbepoetin alfa administered subcutaneously every other week (Q2W) in maintaining hemoglobin (Hb) in CKD patients not receiving dialysis. METHODS: This is a subgroup analysis of subjects converted from once-weekly (QW) recombinant human erythropoietin (rHuEPO; US Aranesp package insert) and who received up to 52 weeks of darbepoetin alfa therapy (evaluation period 20-32 weeks). Enrolled subjects had a creatinine clearance < or = 70 ml/min or an estimated glomerular filtration rate < or = 60 ml/min and transferrin saturation > or = 20%. Darbepoetin alfa doses were titrated to maintain Hb levels < or = 12 g/dl. The primary endpoint was mean Hb during evaluation. RESULTS: There were 524 subjects enrolled in the study who were previously receiving rHuEPO QW. Mean Hb +/- standard deviation was 11.2 +/- 1.27 g/dl at baseline, and the least squares mean +/- SE was 11.4 +/- 0.04 during evaluation. The mean +/- SD Q2W darbepoetin alfa dose was 49.7 +/- 21.9 microg at baseline and 48.9 +/- 35.5 microg at evaluation. Darbepoetin alfa was well tolerated. CONCLUSIONS: Study subjects with CKD receiving QW rHuEPO were effectively converted to Q2W darbepoetin alfa, which was well tolerated. Hb levels were maintained over 52 weeks without a significant change in darbepoetin alfa dose.
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