Routine laboratory model for identifying significant fibrosis in chronic hepatitis B

Figure 6 Model explainability using SHapley Additive exPlanations (surrogate model). SHapley Additive exPlanations analysis illustrating the relative importance and directional effects of key predictors in the ensemble model. Platelet count, albumin/globulin ratio, aspartate aminotransferase/alanine aminotransferase ratio, and age were the major contributors, with feature effects showing clinically consistent patterns. A: Global feature importance (surrogate model); B: SHapley Additive exPlanations summary (red = higher values, blue = lower values). SHAP: SHapley Additive exPlanations; AST: Aspartate aminotransferase; ALT: Alanine aminotransferase ratio.