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Variable importance plot for XGBoost. NIHSS, National Institute of Health Stroke Scale; 25-OH D, 25-hydroxyvitamin D, WBC, white blood cell; BUN, blood urea nitrogen; TOAST, Trial of Org 10172 in Acute Stroke Treatment; LAA, large artery atherosclerosis; d2-3, 2nd and 3rd dummy variable; IV, intravenous. X-axis represents variable importance in the extreme gradient boosting prediction.
