Observational studyEinstein (Sao Paulo, Brazil)2026
Donor-recipient risk assessment in extended criteria liver transplantation: a comparative analysis of prognostic scores.
Observational study in Einstein (Sao Paulo, Brazil), 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
objectiveThis study aimed to evaluate the association between the use of extended criteria donors and post-transplant outcomes in a Brazilian liver transplantation center and to compare the prognostic performance of established severity scores.
methodsWe conducted a retrospective observational study of liver transplantation performed between 2016 and 2020. Patient and graft survivals were assessed at 3, 12, 36, and 60 months. Extended criteria donor status was defined according to the Eurotransplant criteria. The predictive values of the Donor-Model for End-Stage Liver Disease, Donor Risk Index, and Balance of Risk scores were analyzed using categorical and continuous models.
resultsAmong 414 transplants, 62% (n=258) involved extended criteria donor grafts. One- and five-year patient survival rates were 89.5% and 82.5%, respectively, with no significant difference between extended criteria donor and non-extended criteria donor groups (log-rank p=0.074). The extended criteria donor classification was not independently associated with mortality. The Balance of Risk score was the only prognostic model significantly associated with mortality and graft loss. Each one-point increase in the Balance of Risk was associated with a 7.3% increase in mortality risk (hazard ratio [HR]=1.073; 95% confidence interval [95%CI], 1.016-1.133; p=0.012) and a 17.4% increase in graft loss risk (HR=1.174; 95%CI=1.073-1.284; p<0.001).
conclusionIn this cohort, extended criteria donor status alone did not predict inferior survival, whereas the Balance of Risk score demonstrated consistent prognostic discrimination. These findings support the use of integrated donor-recipient risk assessment to guide organ acceptance and allocation decisions in liver transplantation.
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