Abstract
Background
The pre-dialysis care trajectory impact on post-dialysis outcomes is poorly known. This study assessed survival, access to kidney transplant waiting list and to transplantation after dialysis initiation by taking into account the patients’ pre-dialysis care consumption (inpatient and outpatient) and the conditions of dialysis start: initiation context (emergency or planned) and vascular access type (catheter or fistula).
Methods
Adults who started dialysis in France in 2015 were included. Clinical data came from the French REIN registry and data on the care trajectory from the French National Health Data system (SNDS). The Cox model was used to assess survival and access to kidney transplantation.
Results
We included 8856 patients with a mean age of 68 years. Survival was shorter in patients with emergency or planned dialysis initiation with a catheter compared to patients with planned dialysis with a fistula. The risk of death was lower in patients who were seen by a nephrologist more than once in the 6 months before dialysis than in those who were seen only once. The rate of kidney transplant at 1 year post-dialysis was lower for patients with emergency or planned dialysis initiation with a catheter (respectively, HR = 0.5 [0.4; 0.8] and HR = 0.7 [0.5; 0.9]) compared to patients with planned dialysis start with a fistula. Patients who were seen by a nephrologist more than three times between 0 and 6 months before dialysis start were more likely to access the waiting list 1 and 3 years after dialysis start (respectively, HR = 1.3 [1.1; 1.5] and HR = 1.2 [1.1; 1.4]).
Conclusions
Nephrological follow-up in the year before dialysis initiation is associated with better survival and higher probability of access to kidney transplantation. These results emphasize the importance of early patient referral to nephrologists by general practitioners.
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Data availability
Access to the data of the REIN registry implies the approval by the REIN scientific board which analyzes each request. Information about the data of the REIN registry can be requested by mail to Dr. Cécile Couchoud who manages the REIN registry at the French Biomedicine Agency (cecile.couchoud@biomedecine.fr).
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Acknowledgements
The authors would like to thank all people involved in the REIN registry (nephrologists, epidemiologists, clinical research associates, and data managers). The list of centers that participate in the REIN registry is available in the 2019 annual REIN report (https://www.agence-biomedecine.fr/IMG/pdf/rapport_rein_2019_2021-10-14.pdf).
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The project administrator is SB. Data were prepared by MR. The methodology was discussed with JP, MR, CC, CV and SB. JP carried out the analyses and wrote the main text of the manuscript. All authors reviewed the manuscript.
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On behalf of all authors, the corresponding author states that there is no conflict of interest. The results presented in this paper have not been published previously in whole or part, except in abstract format.
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The restrictions due to French Personal data protection regulation (CNIL) prohibit the authors from making the minimal data set publicly available. The French REIN registry received the authorization from the CNIL (Commission Nationale de l’Information et des Libertés) in 2010 (agreement number: 903188 Version 3). This procedure was approved by the ethics committee.
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Piveteau, J., Raffray, M., Couchoud, C. et al. Pre-dialysis care trajectory and post-dialysis survival and transplantation access in patients with end-stage kidney disease. J Nephrol 36, 2057–2070 (2023). https://doi.org/10.1007/s40620-023-01711-y
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DOI: https://doi.org/10.1007/s40620-023-01711-y