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Background and Aims Hepcidin plays a central role in iron metabolism. However, few studies have evaluated the relationship between serum hepcidin and the progression of chronic kidney disease (CKD). This study aimed to determine the relationship between serum hepcidin levels and the progression of renal diseases in patients with CKD. Method We reviewed data of 2,016 patients from a large-scale multicenter, prospective study enrolled between 2011 and 2016, who had data regarding the serum hepcidin level, hemoglobin level, iron indices, usage of erythopoiesis-stimulating agents (ESA) or iron, and follow-up of renal events. Renal events were defined as a &amp;gt;50% decrease in kidney function from the baseline values, doubling of the serum creatinine level, or initiation of renal-replacement treatment. Results During a mean 3.6 years, 556 patients developed renal events (27.6%). In multivariate Cox proportional hazard regression analysis adjusted for confounders including kidney function, the hemoglobin level, conventional iron indices, usage of ESA or iron, and other chronic diseases, the hazard of serum hepcidin for renal events was evident in the comparison between only the first and fourth quartiles (hazard ratio 1.603, 95% confidence interval, 1.187-2.163, P = 0.002). In the multivariate penalized spline curve analysis, the relationship between serum hepcidin and renal events was J-shaped, and the renal hazard was particularly evident at a serum hepcidin level ≥60 ng/ml. Conclusion Increased serum hepcidin levels independently predict the progression of CKD in non-dialysis patients with CKD. The potential direct renal hazard of serum hepcidin needs to be confirmed in future randomized controlled trials.

nephrology, dialysis, transplantation/nephrology dialysis transplantation

P0192RELATIONSHIP BETWEEN SERUM HEPCIDIN AND THE PROGRESSION OF CHRONIC KIDNEY DISEASE: KOREAN COHORT STUDY FOR OUTCOME IN PATIENTS WITH CHRONIC KIDNEY DISEASE (KNOW-CKD)