Fig. 4

The partial dependence plots of the XGboost model based on SHAP. A-P show how the RDW_max, age, MCV_min, Heartrate_mean, Tempc_mean, Resprate_mean, Po2_min, PT_max, MAP, platelet_min, lactate_max, WBC_max, PTT_max, gender and MCHC_min affects the output of the XGBoost prediction model respectively. As the SHAP value exceeds zero, it indicated a promoting effect on the 28-day death risk. RDW=red blood cell distribution width; MCV=mean corpuscular volume; BUN=blood urea nitrogen; MBP=mean blood pressure; WBC=white blood cell; MCHC=mean corpuscular hemoglobin concentration