Post liver transplant short term and survival outcomes in patients living with obesity

The objectives of our study were to examine and compare patient and graft survival over a 5-year period across BMI groups, and examine immediate and short-term complications post-LT. This was a retrospective study that examined all liver transplants that occurred at our institution between January 2015-October 2022. Patients were divided into 4 BMI groups (n = 888): normal-overweight (BMI 18.5- 29.9 kg/m²), class I obesity (BMI 30-34.9 kg/m²), class II obesity (BMI 35-39.9 kg/m²), and class III obesity (BMI ≥40 kg/m²) patients. Kaplan Meier curves with the log rank test were created to assess survival outcomes and multivariate Cox regression analysis was performed. Patient and graft survival did not differ statistically between each BMI group. However, patient survival was significantly lower in patients with BMI ≥40 compared to patients with BMI <40. In multivariate analysis, BMI ≥40, admission to the ICU, and age were independent predictors of increased risk of mortality. Infection, arrhythmia, cardiac arrest, and myocardial infarction were more frequent immediate complications in the class III obesity group. Efforts to closely monitor patients with BMI ≥40 post LT to maximize survival are needed. Further studies are needed to improve post LT survival among patients with BMI ≥40.