Figure 7.

Confusion matrix of the predictive models using the test dataset (oversampling). The test sample was oversampled from the original test dataset (30% of the cohort). The true label of the longitude number indicated the ground targets and negative labels (1 and 0 mapped recipients with and without severe pneumonia, respectively). Predicted label of the transverse number indicated predicted labels for each algorithm (1 and 0 mapped predicted recipients with and without severe pneumonia, respectively). Among the five machine learning algorithms, the Random Forest algorithm produced the best prediction.