Factors affecting outcomes of liver transplantation: an analysis of OPTN/UNOS database.

This was a historic cohort analysis based on 110,521 patients who underwent liver transplant between 1987 and July 2011 in the United States and were reported to the UNOS registry. In addition to univariate Kaplan-Meier survival analyses, we used cox proportional hazard analysis and multiple logistic regression analysis to evaluate hazard ratios adjusted for clinical factors. The overall 5- and 10-year patient survival rates were 81% and 72%, respectively, for 4,412 recipients of living donor livers and 73% and 59%, respectively, for 106,109 recipients of deceased donor livers. Multivariate analyses suggest that these differences are due to demographics, including patient age rather than differences due to the donor organs. Recipients of zero HLA-mismatched livers had significantly worst graft survival (HR 1.29, p = 0.02) compared with those given an HLA mismatched graft. This appears to be due in part to graft versus host disease. Among recipients who experienced GVHD, multivariate analysis revealed that zero mismatch of HLA-A (HR 2.75), zero mismatch of HLA-B (HR 4.79), recipient age > 65 (HR 2.57) and Asian recipient (HR 2.70) were significant risk factors for GVHD respectively.