Abbreviations
ANOVA: one-way analysis of variance; AUC: area under curve; cfDNA:
cell-free deoxyribonucleic acid; CID: collision-induced dissociation;
CPSI-MS: conductive polymer spray ionization mass spectrometry; CTC:
circulating tumor cell; DESI-MS: desorption electrospray ionization mass
spectrometry; DG: diacylglycerol; DT: decision tree; FDR: false
discovery rate; GPC: glycerophosphocholine; HC: healthy contrast; IS:
internal standard; KNN: k-nearest neighboring; LDA: linear discriminant
analysis; lyso-GPC: lyso-glycerophosphocholine; ML: machine learning;
MS/MS: tandem mass spectrometry; mRNA: messenger ribonucleic acid; NB:
naïve Bayesian; OPLS-DA: orthogonal partial least squares data analysis;
OSCC: oral squamous cell carcinoma; PML: premalignant lesion; PPV:
positive prediction value; QC: quality control; ROC: receiver operating
characteristic; RSD: relative standard deviation; SVM: supporting vector
machine; TIC: total ion current; t-SNE: t-stochastic neighbor embedding;
TPR: true positive rate; VIP: variable importance on projection;