William Irish

Introduction The purpose of this study was to compare early outcomes of de novo LCPT (once‐daily extended‐release tacrolimus) to IR TAC (twice‐daily immediate‐release tacrolimus) in a predominantly African American (AA) adult kidney transplant population. Methods This is a single center, retrospective cohort study. Patients were divided into two cohorts: IR TAC (administered between January 1, 2017, and January 31, 2019) and LCPT (administered between February 1, 2019, and May 31, 2020). Primary endpoints were changes in tacrolimus trough levels (ng/mL) and estimated glomerular filtration rate up to 12 months post‐transplantation. Clinical endpoints included graft survival, delayed graft function, biopsy‐proven rejection, CMV viremia, and BK. A propensity score weighted generalized linear mixed effects model was used for analysis. Results The rate of change in tacrolimus levels was significantly higher in the LCPT cohort compared to the IR TAC cohort at 14 days post‐discharge (.2455 ng/mL per day vs. .1073 ng/mL, respectively; p < .001). Subsequently, the LCPT cohort had a slightly higher rate of decline (–.015 ng/mL per day vs. –.010 ng/mL with IR TAC; p = .0894) up to 12 months post‐discharge. Although eGFR was similar between the two cohorts at 12 months post‐transplant, the rate of increase was slower in the LCPT cohort (.1371 mL/min per day vs. .1852 mL/min per day, p = .0314). No significant differences were found in graft survival, DGF, BPAR, CMV, or BK infection. Conclusion This study demonstrates that despite higher early trough levels with immediate post‐transplant LCPT use, clinical outcomes are comparable to IR TAC at one‐year post‐transplant. Notably, LCPT use does not increase the incidence of DGF and that this formulation of CNI can be used as first line therapy post‐transplant.