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  • Title: A comparative analysis of kidney allograft outcomes in steroid use versus steroid discontinuation after basiliximab and ATG induction: A UNOS database study.
    Author: Nissaisorakarn P, Patel H, Cardarelli F, Amtul A.
    Journal: Clin Nephrol; 2024 Jul; 102():39-50. PubMed ID: 38699983.
    Abstract:
    BACKGROUND AND OBJECTIVES: The relative safety and efficacy of early steroid withdrawal in kidney transplant patients after basiliximab compared to anti-thymocyte globulin (ATG) induction therapy is unknown. We aimed to compare kidney allograft outcomes in steroid use versus steroid discontinuation after basiliximab and ATG induction from the United Network for Organ Sharing (UNOS) database. MATERIALS AND METHODS: We conducted a retrospective cohort analysis of the UNOS database and included first kidney transplant recipients who received ATG or basiliximab induction therapy. We compared graft and patient outcomes in those who received steroid maintenance and those who were discharged off steroids. RESULTS: Of 106,061 patients, 25,344 (86.7%) received basiliximab induction and were maintained on steroids (B-Sm), and 3,880 (13.3%) were on a steroid-free regimen (B-Sf). Graft failure rate was significantly higher in the B-Sf compared to B-Sm at 1-year (4.1 vs. 1.8%, p < 0.001), 3-year (6.0 vs. 4.3%, p < 0.001) and 5-year follow-up (7.7 vs. 6.4%, p = 0.0004). The mortality rate was significantly higher in B-Sf at 1-year (3.3 vs. 2.4%, p = 0.0005), 3-year (7.6 vs. 5.5%, p < 0.001) and 5-year follow-up (11.5 vs. 8.8%, p < 0.001) when compared to the B-Sm. 76,837 recipients received ATG induction therapy, 51,745 (72.4%) were on steroid maintenance therapy (A-Sm) and 25,092 (32.6%) were on a steroid-free regimen (A-Sf). The graft failure rate was significantly higher in A-Sf compared to A-Sm at 1-year follow-up (2.6 vs. 2.3%, p = 0.0006), however, there was no difference at 3-year (5.0 vs. 5.0%, p = 0.53) or 5-year follow-up (7.2 vs. 8.1%, p = 0.17). There was no difference in mortality rates between A-Sf vs. A-Sm at 1 year (2.5 vs. 2.4%, p = 0.98) and at 3 years (5.5 vs. 5.4%, p = 0.45), respectively. CONCLUSION: Patients who were maintained on steroids after basiliximab induction had better 5-year allograft survival and patient survival compared to those who were not maintained on steroids. However, steroid maintenance conferred no additional benefit after ATG induction and was associated with higher mortality.
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