Abstract
The triad of diabetes mellitus, anemia, and chronic kidney disease (CKD) define a group of patients at high risk for death and cardiovascular complications. The approval of epoetin alfa in 1989 transformed the treatment of anemia in patients with CKD. However, evidence has emerged from randomized controlled trials that correcting anemia with erythropoiesis-stimulating agents in CKD patients is associated with increased risk. Most recently, the TREAT (Trial to Reduce Cardiovascular Events With Aranesp Therapy) study of anemic type 2 diabetic patients with CKD reported that treatment with darbepoetin conferred no benefit in mortality or in attenuating cardiovascular or renal events. Instead, there was a twofold higher rate of stroke and thromboembolic complications and a higher rate of cancer deaths in patients randomized to treatment with darbepoetin. Furthermore, there was an inconsistent and modest improvement in health-related quality of life. TREAT raises questions about whether anemia in type 2 diabetic patients should be treated and under what circumstances.
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