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  • Title: An open-label study of darbepoetin alfa administered once monthly for the maintenance of haemoglobin concentrations in patients with chronic kidney disease not receiving dialysis.
    Author: Agarwal AK, Silver MR, Reed JE, Dhingra RK, Liu W, Varma N, Stehman-Breen C.
    Journal: J Intern Med; 2006 Dec; 260(6):577-85. PubMed ID: 17116009.
    Abstract:
    OBJECTIVE: To demonstrate the efficacy and safety of once-monthly (QM) darbepoetin alfa administration in maintaining haemoglobin (Hb) 11.0-13.0 g dL(-1) in subjects with chronic kidney disease (CKD) not receiving dialysis and previously treated with darbepoetin alfa every other week (Q2W). SUBJECTS: This open-label study enrolled subjects > or =18 years of age who had glomerular filtration rate > or =15 and < or =60 mL min(-1)/1.73 m(2), had Hb 11.0-13.0 g dL(-1), and were receiving Q2W darbepoetin alfa. DESIGN: Subjects were switched to QM darbepoetin alfa therapy for 28 weeks; the QM dose was titrated to maintain Hb levels. Primary end-point: proportion of subjects maintaining Hb > or =11.0 g dL(-1) during the final 8 weeks of the study (evaluation phase). Secondary end-points: Hb concentration during evaluation, darbepoetin alfa dose during the study, adverse events, laboratory parameters, and blood pressure. RESULTS: The study enrolled 152 subjects (female 52%, white 64%). Mean Hb > or =11.0 g dL(-1) during evaluation was achieved by 76% of the 150 subjects who received at least one dose of darbepoetin alfa [95% confidence interval (CI): 68%, 83%]. Mean (SD) Hb during evaluation was 11.71 (0.92) g dL(-1). Eighty-five per cent of 129 subjects who completed the study (95% CI: 78%, 91%) had Hb > or =11.0 g dL(-1) during evaluation. The dose of darbepoetin alfa over the study period was median (95% CI) 124.4 mug (106.2, 140.0). Darbepoetin alpha administered QM was well tolerated in study subjects. CONCLUSION: Darbepoetin alpha administered QM maintained Hb in study subjects with CKD not receiving dialysis.
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