Assessment of the Completeness and Representativeness of the RDPLF Registry Using the French National REIN Registry as a Reference

For more than 40 years, the French Language Peritoneal Dialysis (and Home Hemodialysis) Registry (RDPLF) has been a major source of data on home dialysis treatment modalities. Since centers participate on a voluntary basis, the question of its completeness and national representativeness remains essential. This study evaluates these parameters by comparing RDPLF data with those from the 2026 report of the French national REIN registry, which is considered comprehensive for France.The comparison is based on data as of December 31, 2024; several common indicators were analyzed: number of prevalent and incident patients on peritoneal dialysis, regional distribution of patients, treatment modalities by age, level of autonomy, use of assistance, and parameters related to anemia. The results show that the RDPLF captures between 90% and 97% of prevalent patients recorded in REIN. The number of incident patients is slightly higher in the RDPLF, likely due to differences in the timing of data updates. Despite these discrepancies, the trends observed in the two registries are remarkably consistent.A comparison of patient characteristics and treatment practices reveals a very high degree of consistency. The distributions of peritoneal dialysis techniques by age, levels of autonomy, and dialysis modalities are virtually identical. These results confirm the RDPLF’s national representativeness for peritoneal dialysis in France and highlight the complementary nature of the two registries. While REIN provides comprehensive surveillance of chronic kidney disease, the RDPLF offers detailed, specialized clinical data on home-based treatments. This complementarity is a significant asset for evaluating practices and developing home dialysis strategies.