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Top-10 variable importance of GBDT. GBDT = gradient boosting decision tree, GCS = Glasgow coma scale, max2 = parameter maximum in 48 hours of admission, Mean1 = average of parameters within 24 hours of admission, mean2 = average of parameters within 48 hours of admission, min2 = parameter minimum in 48 hours of admission, PTT = partial thromboplastin time.
