Fig. 6

CHI decreases with severity of CHD patients. (A) As the severity of CHD increases, the CHI decreases, as depicted in a set of box plots. (B) The forest plot displays the ROC curve results for the CHD prediction models, with dots and error bars indicating the means and SDs of the AUC. Through 2-fold cross-validation, XGBoost emerged as the top performer in the training set according to the AUC