Fig. 2.

Box plots of the goodness of fit as measured by AUC values and Brier score for 50 repeatedly performed data splits for each model approach in model development for predicting critical in-hospital events using COVID-19-infected patient’s data on hospital admission. Box plots show the smallest value (low whisker), lower quartile (lower boundary of the box), median (vertical line in the box), upper quartile (upper boundary of the box), and maximum value (upper whisker)