Construction of the RSF model in predicting early recurrence in the training cohort. (A) Prediction error rates. (B) The VIMP plot. Macro VI, macrovascular invasion; Micro VI, microvascular invasion; AFP, alpha-fetoprotein; ALB, albumin; PLT, platelet count; TBIL, total bilirubin; RSF, random survival forests; VIMP, variable importance.