ASN's Mission

To create a world without kidney diseases, the ASN Alliance for Kidney Health elevates care by educating and informing, driving breakthroughs and innovation, and advocating for policies that create transformative changes in kidney medicine throughout the world.

learn more

Contact ASN

1401 H St, NW, Ste 900, Washington, DC 20005

email@asn-online.org

202-640-4660

The Latest on X

Kidney Week

Abstract: FR-PO0237

PDOPPS International Anemia Prevalence and Management in People Receiving Peritoneal Dialysis

Session Information

Category: Anemia and Iron Metabolism

  • 200 Anemia and Iron Metabolism

Authors

  • Spencer, Sebastian, University of Hull, Hull, England, United Kingdom
  • Lambie, Mark, Keele University, Newcastle-under-Lyme, England, United Kingdom
  • Bhandari, Sunil, Hull University Teaching Hospitals NHS Trust, Hull, England, United Kingdom
Background

Optimal anemia management in peritoneal dialysis (PD) remains uncertain, with substantial variation in clinical practice across countries. We aimed to describe the evolution over time of iron indices in people receiving PD, the determinants of this and the associations of these indices with mortality.

Methods

We analyzed baseline data from adult PD patients enrolled in the Peritoneal Dialysis Outcomes and Practice Patterns Study across seven countries: Australia/New Zealand, Japan, USA, UK, Thailand, and Canada. Cross-sectional comparisons were made for hemoglobin, ferritin, transferrin saturation (TSAT), serum iron, total iron-binding capacity (TIBC), and use of erythropoiesis-stimulating agents and iron (oral or intravenous). Time-varying Cox models with restricted cubic splines were used to examine associations of iron, TSAT, TIBC and ferritin with all-cause, cardiovascular and infection-related mortalities.

Results

The analysis included 7,930 patients. Time-varying Cox models demonstrated U-shaped associations between serum iron, TSAT and TIBC with all-cause, cardiovascular, and infection-related mortality. Ferritin showed a monotonic increase in hazard, particularly for all-cause and cardiovascular mortality, likely reflecting its dual role as a marker of iron stores and inflammation. These findings support a multi-marker approach to iron assessment, rather than reliance on ferritin alone.

Conclusion

High and low levels of iron, TSAT, and TIBC were linked to increased mortality. In contrast, ferritin showed a steady increase in hazard, particularly for all-cause and cardiovascular mortality, likely due to its inflammatory nature. These findings suggest ferritin is a poor standalone marker of iron status in peritoneal dialysis patients.

Association between iron biomarkers and mortality

Digital Object Identifier (DOI)