A Study of Monthly Subcutaneous Continuous Erythropoietin Receptor Activator (CERA) in Predialysis Participants With Chronic Renal Anemia

This single arm study will assess the long term maintenance of hemoglobin (Hb) levels, safety and tolerability of once monthly subcutaneous methoxy polyethylene glycol-epoetin beta (CERA) in predialysis participants with chronic renal anemia. Participants currently receiving subcutaneous darbopoetin alfa maintenance treatment will receive subcutaneous methoxy polyethylene glycol-epoetin beta for a maximum of 32 weeks at a starting dose of 120, 200 or 360 micrograms every 4 weeks according to the dose of darbopoetin alfa administered in Week -1. Subsequent doses will be adjusted to maintain hemoglobin levels within the target range of 10 to 12 grams per deciliter (g/dL).