Cox proportional hazards regression model for tumor-free survival.

IS: immunosuppression; MELD: model for end-stage liver disease; HBV: hepatitis B virus; HCV: hepatitis C virus; AFP: alpha-fetoprotein; HR, hazard ratio; CI, confidence interval; vs., versus.§ 18 cases with missing data were excluded;¶ 23 cases with missing data were excluded;★ 20 cases with missing data were excluded;※ 38 cases with missing data were excluded;♦ 25 cases with missing data were excluded.▲ Adjusted for transplant year in multivariate model.☯ 40 cases with missing data were excluded in multivariate model.Cox proportional hazards regression model for tumor-free survival.