Complications Associated With Liver Transplantation in Recipients With Body Mass Index >35 kg/m2: Would It Be a Poor Prognosis Predictive Factor?

Abstract Background Obesity is a global epidemic that continues to increase in a great number of countries, and it has become a major public health problem in Spain. Unfortunately, the impact of obesity on survival in liver transplantation (LT) recipients is underestimated and controversial. The aim of this study was to determine if obesity is a risk factor for morbidity and mortality after LT. Methods In a retrospective cohort study of the records of 180 consecutive patients who had undergone to LT from 2007 to 2013, 11 obese patients with body mass index (BMI) >35 kg/m 2 were identified. Their data have been compared with recipients with BMI 20–25 kg/m 2 . Results There were no differences in demographic data, Child-Pugh score, Model for End-Stage Liver Disease score, or cause of liver failure. BMI >35 kg/m 2 recipients had a significantly higher rate of portal vein thrombosis before LT, compared with the BMI 20–25 kg/m 2 group (36.5% vs 13.9%; P  = .041). There were also no differences in development of post-reperfusion syndrome. The groups were also comparable concerning morbidity rate after LT, stay in the intensive care unit, and global hospital stay. However, the mortality rate was significantly higher in the obese group compared with the nonobese group (72.7% vs 38.9%; P  = .032). Conclusions The results of the study clearly demonstrate higher mortality rates in obese patients undergoing LT; thus, it is fair to consider obesity as a poor prognosis predictive factor concerning mortality rate.