Figure 5.

Classification and Regression Tree. Classification regarding time from symptom onset ≤ or >4.5 hours; leafs A–E show individual patient numbers categorized by significant splitting predictor variables; numbers in individual leafs denote patients with time from symptom onset ≤4.5 hours (black) or >4.5 hours (white). Variables included in the model: fluid-attenuated inversion recovery (FLAIR) lesion visibility, FLAIR signal intensity (SI) ratio, and diffusion-weighted imaging (DWI) lesion volume.