Statistical Analysis
Continuous, normally distributed data are presented as mean (± standard deviation), and continuous, nonparametric data are presented as median [interquartile range (IQR)]. Categorical data are displayed as a number (percentage). Preoperative baseline characteristics were compared between groups using Student’s t-test for normally distributed continuous variables and Wilcoxon rank sum test for nonparametric variables. Categorical variables were compared using either chi square or Fisher’s exact test when appropriate.
Kaplan Meier survival analysis was used to compare one-year survival among weight change cohorts. Multivariable Cox proportional hazards modeling was performed to evaluate the risk-adjusted predictors of one-year posttransplant mortality. B-spline regression was used to model effects of weight loss across initial waitlisting BMI. Statistical analysis was performed using Stata version 16.1 statistical software (StataCorp, College Station, TX, USA).