Fig. 4From: Using machine learning of clinical data to diagnose COVID-19: a systematic review and meta-analysisSummary of XGBoost classification of COVID-19 and influenza patients. a ROC curve of prediction. b Precision recall curve of prediction. c Confusion matrix of prediction. d Variables most important for classification, listed by decreasing order of importance. e 6-level sample model of SOM decision tree constructionBack to article page