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Feature importance derived from the XGBoost model for mortality in the following 48 h. The importance value represents the fractional contribution of each feature to the XGBoost model based on the total gain of this feature's splits. Higher percentage means a more important feature. GCS, glasgow coma scale; PaCO2, partial pressure of arterial carbon dioxide; PaO2, partial pressure of arterial oxygen; INR, international normalized ratio; RRT, renal replacement therapy.
