Figure 1.

Receiver operating characteristic curve and the SHAP value of prehospital stroke prediction. (a) Training cohort (derivation cohort). (b) Test cohort (validation cohort). (c) SHAP value of stroke. AUROC (area under the receiver operating characteristic curve), CI (confidence interval), XGBoost (eXtreme Gradient Boosting), SVM (support vector machine), SHAP (SHapley Additive exPlanation), GCS M (Glasgow coma scale, best motor response), onset hour $\left(cos\left(2\pi \frac{hou{r}_{\mathit{onset}}}{24}\right)\right)$.