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  • Title: Darbepoetin Alfa in Patients with Advanced CKD without Diabetes: Randomized, Controlled Trial.
    Author: Hayashi T, Maruyama S, Nangaku M, Narita I, Hirakata H, Tanabe K, Morita S, Tsubakihara Y, Imai E, Akizawa T, PREDICT Investigators.
    Journal: Clin J Am Soc Nephrol; 2020 May 07; 15(5):608-615. PubMed ID: 32245781.
    Abstract:
    BACKGROUND AND OBJECTIVES: Large, randomized, controlled trials targeting higher hemoglobin level with erythropoiesis-stimulating agents for Western patients with CKD showed harm. However, the effect of anemia correction using erythropoiesis-stimulating agents may differ between CKD subpopulations. The Prevention of ESKD by Darbepoetin Alfa in CKD Patients with Non-diabetic Kidney Disease study, a multicenter, randomized, open-label, parallel-group study, aimed to examine the effect of targeting hemoglobin levels of 11-13 g/dl using darbepoetin alfa with reference to a low-hemoglobin target of 9-11 g/dl on kidney outcome in patients with advanced CKD without diabetes in Japan. DESIGN, SETTING, PARTICIPANTS, & MEASUREMENTS: We enrolled 491 patients with CKD without diabetes, and an eGFR of 8-20 ml/min per 1.73 m2. Of these 491 patients, 239 and 240 were ultimately assigned to the high- and low-hemoglobin groups, respectively (12 patients were excluded). The primary outcome was a kidney composite end point (starting maintenance dialysis, kidney transplantation, eGFR≤6 ml/min per 1.73 m2, and 50% reduction in eGFR). RESULTS: Mean hemoglobin levels were 11.2±1.1 and 10.0±0.9 g/dl in the high- and low-hemoglobin groups, respectively, during the mean study period of 73.5±29.7 weeks. The kidney composite end point occurred in 105 (44%) and 116 (48%) patients in the high- and low-hemoglobin groups, respectively (log-rank test; P=0.32). The adjusted Cox proportional hazards model showed that the hazard ratio for the high- versus low-hemoglobin group was 0.78 (95% confidence interval, 0.60 to 1.03; P=0.08). Cardiovascular events occurred in 19 (8%) and 16 (7%) patients in each group, respectively, with no significant between-group difference (log-rank test; P=0.66). CONCLUSIONS: Targeting a higher hemoglobin level (11-13 g/dl) with darbepoetin alfa did not improve kidney outcome compared with targeting a lower hemoglobin level (9-11 g/dl) in patients with advanced CKD without diabetes. CLINICAL TRIAL REGISTRY NAME AND REGISTRATION NUMBER: Prevention of ESKD by Darbepoetin Alfa in CKD Patients with Non-diabetic Kidney Disease (PREDICT), NCT01581073.
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