hdWGCNA	Hierarchical weighted gene co-expression network analysis
CNN	Convolutional neural network
scRNA-seq	Single-cell RNA sequencing
PD	Periodontitis
HC	Healthy controls
SVM	Support vector machines
KNN	K-nearest neighbor
NB	Naïve Bayes
RF	Random forest
RPART	Recursive partitioning and regression trees
LDA	Linear discriminant analysis
GEO	Gene Expression Omnibus
KEGG	Kyoto Encyclopedia of Genes and Genomes