Fig. 6

Feature importance in the LightGBM-based machine learning models and validation of hub genes in peripheral blood monocytes. A–C Feature importance in the methylation model, expression model and combination model quantized by Gini importance. D-F Feature importance in the methylation model, expression model and combination model based on SHAP values. G, H Methylation and expression levels of the five hub genes in monocytes from CHD patients and controls. I-K PCA plots based on the methylation data, expression data, integrated methylation and expression data of the five hub genes in monocytes from CHD patients and controls