Cox proportional hazards regression model for overall 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. §n = 329; ¶ 7 cases with missing data were excluded; ★ 2 cases with missing data were excluded; ※ 22 cases with missing data were excluded; ♦ 9 cases with missing data were excluded. ▲ Adjusted for transplant year in multivariate model. ☯ 24 cases with missing data were excluded in multivariate model. Cox proportional hazards regression model for overall survival.