Figure 2.

Simple decision tree model showing the classification of ICU patients with lactic acidosis who died (1) and did not (0) die during hospitalization. The numbers with two decimals in each cell mean the probability of mortality in each classification tree. The blue or green color becomes dense when it is more likely to die or not. The % number in the boxes denotes the percentage of patients with each discriminating variable from CART (Classification and Regression Tree) analysis. WBC, White Blood Cell; INR, International Normalized Ratio; RR, Respiratory Rate; MAP, Mean Arterial Pressure; GCS, Glasgow Coma Scale.