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Erythropoiesis-stimulating agents (ESAs) are frequently used among patients with renal anemia, while a significant proportion of patients exhibit ESA hyporesponsiveness despite adequate dosing. Previous studies have suggested an inverse association between ESA hyporesponsiveness and statin use among patients receiving dialysis therapy. However, studies based on predialysis patients are extremely limited.Based on electronic medical records of a tertiary hospital in Beijing, China between April 2010 and April 2015, we investigated the association between statin use and ESA hyporesponsiveness among patients with predialysis-chronic kidney disease (CKD).Altogether 232 patients with CKD initiating ESA therapy and with hemoglobin levels monitored for at least 6 months were included in our analyses. Among them, 77 (38.5%) were long-term statin users (regular statin treatment for more than 3 months) before ESA initiation. Overall, 6.5% of the statin users and 17.1% of nonusers were considered to have ESA hyporesponsiveness. Long-term statin therapy was significantly associated with a lower proportion of ESA hyporesponsiveness in fully adjusted model (odds ratio 0.15, 95% confidence interval: 0.03-0.64).We found that long-term statin therapy was inversely associated with ESA hyporesponsiveness among predialysis patients with CKD. Further studies are needed to validate our observations, and to explore the potential mechanisms between ESA resistance and statin therapy.

Statin therapy and erythropoiesis-stimulating agent hyporesponsiveness in patients with nondialysis chronic kidney disease