Causes of death and associated factors with death after liver transplantation: a nationwide database study

Background/aims: This study investigated overall, 1-year, and 5-year mortality rate, the causes of death, and associated factors with death in liver transplantation recipients.Methods: A total of 11,590 liver transplant recipients identified from National Health Insurance Service database between 2006 and 2017 were included. Factors associated with all-cause of death were analyzed by Cox proportional regression models. Cumulative mortality rate according to the underlying indication was estimated by Kaplan-Meier method.Results: The 12-year survival rate for all liver transplant recipients was 68%. In the overall, 1-year, and 5-year mortality of liver transplant recipients, hepatic death was the highest contributing risk, accounting for >65% of the causes of death. Deaths from cirrhosis and liver failure accounted fora high proportion of deaths within 1 year after transplantation, and deaths from malignant tumors such as hepatocellular carcinoma were high among late-stage deaths.Discussion: Although the most common cause of death from liver transplantation is due to primary disease, there was a difference in the pattern of major causes of death according to the period from transplantation to death. If appropriate medical intervention is performed at each period after transplantation, the survival rate can be improved.