Figure 2
Performance of our model (model p in Table 3) evaluated on the hold-out test set. (a) Receiver operating characteristic curve for model’s predictions. (b) Precision recall curve, the dashed grey line shows the configuration evaluated in the confusion matrix in panel (c). (c) Confusion matrix for predictions dichotomized using a threshold chosen such that the recall is equal to 0.15 (dashed grey line in panel (b)). A class of ‘1’ indicates the patient reattended the emergency department within 72 h of discharge. Diagonal elements represent correct classifications and off-diagonal elements either False positives or negatives.
