This study aims to analyze the effect of blood group on the survival time of liver transplant patients by controlling for age as a covariate using the ANCOVA method. This approach allows for a more objective evaluation of the differences in mean survival time across blood groups by neutralizing the influence of age as a covariate. The findings of this study are expected to contribute to more accurate and personalized clinical decision making, particularly in determining organ allocation priorities based on the biological and demographic characteristics of patients in Indonesia.