Fig. 7
SHAP distribution of key clinical features in the XGBoost efficacy prediction model for PWS. (a) Dermoscopy vascular pattern; (b) IFI at the lesion site after HMME-PDT; (c) The facial port-wine stain area and severity index (FSASI) score; (d) Age. The x-axis represents the statistical values of each feature (with the x-axis in (a) and (b) showing the encoded values of the features), and the y-axis shows the SHAP values attributed to each feature. Each point on the plot indicates the marginal contribution of a sample to the model’s prediction. The color gradient, ranging from blue to red, illustrates the value of another feature that may interact with the primary feature displayed on the x-axis. The color scale is consistent across all subplots, with blue indicating lower values and red indicating higher values of the secondary feature.
