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Background: Acknowledging the importance of preparing the pediatric dialysis patient for successful transfer to adult providers, centers from the Standardizing Care to Improve Outcomes in Pediatric End Stage Renal Disease (SCOPE) Dialysis Collaborative developed transition tools and performed iterative implementation of a transition of care (TOC) program to gain real-life insight into drivers and barriers towards implementation of a transition program for patients receiving dialysis. Methods: A TOC innovation workgroup was developed in 2019 from within SCOPE Collaborative that developed nine educational modules, along with introductory letter and assessment tool to be utilized by SCOPE centers. A 4-month pilot implementation study among six centers of varying patient population (age ≥ 11 years) was performed. TOC tools were further refined, and broader implementation within the collaborative was performed. Interim assessment of TOC tool utilization and implementation success was performed among 11 centers, as a foundation towards broader discussion regarding process, barriers, and success towards TOC implementation among 26 centers. Results: Transition champion was a key driver of successful implementation, and lack of institutional support and collaboration with adult dialysis centers were important barriers towards sustainability. COVID pandemic and increased staff turnover affected longer term implementation of TOC program. Conclusions: Successful transition and transfer of adolescents/young adults with kidney failure on dialysis remains a challenge. This study represents the experience of the largest cohort of pediatric dialysis centers, with diversity in population size and geography, towards development and implementation of a TOC program. This adds to the resources available to assist centers towards transition and transfer, with particular focus on transitioning patients on dialysis. A higher resolution version of the Graphical abstract is available as Supplementary information. [ABSTRACT FROM AUTHOR]

HLA eplet mismatch load has been suggested as an improvement to HLA antigen mismatch determination for organ selection. Given that eplet mismatches are determined based on amino acid sequence difference among HLA alleles, and that the frequency of HLA alleles varies between racial groups, we investigated the correlation between eplet mismatch load and allograft outcomes in 110 pediatric kidney transplant recipients who received their first organ from a donor of the same race (SRT) versus a donor of a different race (DRT). Adjusted modified Poisson regression was used to assess the interaction between eplet mismatch load and race mismatch and its effect on outcome. Caucasians and living donor recipients had lower eplet mismatched loads against their donors compared with non-Caucasian and deceased donor recipients. Overall, for the entire population, the risk of de novo HLA-DSA development was significantly increased with higher eplet loads (p < 0.001). Compared with the SRT group, the DRT group had higher eplet loads when compared with their donor, for HLA class I but not HLA class II molecules; however, there was no significant difference in the incidence of de novo HLA-DSA between the 2 groups. The risk of rejection increased significantly for DRT compared with SRT, only when class I eplet load was ≥ 70 (p = 0.04). Together this data show that eplet mismatch load analysis is an effective tool for alloimmune risk assessment. If considered for donor selection, acceptable eplet mismatch loads determined from studies in homogenous populations may restrict transplantation across racially diverse donor and patient groups with no evidence of poor outcome. Therefore, an acceptable eplet mismatch load threshold must consider the heterogeneity of the transplant population. [ABSTRACT FROM AUTHOR]