Fig. 3From: Development and validation of a novel blending machine learning model for hospital mortality prediction in ICU patients with SepsisCalibration curves for external validation on the test set. For each model, the calibration curve was drew by dividing predicted probabilities into ten subgroups according to deciles of the [0,1] interval and plotting mean predicted probability versus mean actual probability for each subgroup. As shown, each blue point of a calibration curve represented a subgroup and the size of the gray circle around represented sample size of this subgroup. The dotted line was the identity line of y = x representing perfect calibration. The closer a calibration curve was to the identity line, the more similar predicted mortality was to actual mortality, indicating a better calibration of a model. Abbreviations: SAPS II Simplified Acute Physiology Score II, SOFA Sequential Organ Failure Assessment, BM_total blending model based on the total variables, BM_reg blending model based on variables selected by stepwise regression model, BM_SAPSII blending model based on SAPS II related variables, BM_SOFA blending model based on SOFA related variablesBack to article page