Comparison of Posttransplant Outcomes in Living Donor Liver Transplantation for Obese and Nonobese Recipients

Background: Although living donor liver transplantation for obese recipients has increased, it has not been determined that posttransplant outcomes in obese recipients are inferior compared with nonobese recipients. Methods: From January 2001 to December 2016, there was a total of 58 (6%) obese patients (body mass index ≥30) in a cohort of 973 adult patients that underwent living donor liver transplantation. Propensity score matching and classification were performed based on the type of obesity, and there were 58 patients in the obese group and 141 patients in the nonobese group. We performed comparative analysis of posttransplant outcomes including Model for Early Allograft Function (MEAF) scoring and early allograft dysfunction (EAD). Results: EAD was found in 11 (19%) and 31 (22%) patients in the obese and nonobese groups, respectively (P =.71). The obese group had a higher MEAF score than the nonobese group (5.2 vs 4.5, P =.007). The mean hospitalization of the obese group was shorter than in the nonobese group (32 vs 42 days, P =.003). Other posttransplant outcomes were similar between the obese and nonobese groups, including acute cellular rejection (8 vs 10 cases, P =.17), early graft failure (8 vs 12 cases, P =.30), index hospital mortality (6 vs 11 cases, P =.58), and comprehensive complication index (26.0 vs 24.6, P =.76). Conclusion: Posttransplant outcomes of the obese group were not inferior to the nonobese group. However, obesity can impact the severity of EAD and the incidence of early graft failure, based on significantly higher MEAF scores.