Aβ	Amyloid beta
AD	Alzheimer’s disease
AUC	Area Under the Curve
aMCI	Amnestic mild cognitive impairment
BOP	Bleeding on probing
CAL CHC	Clinical attachment level Cognitively healthy control
DIABLO	Data Integration Analysis for Biomarker discovery using Latent cOmponents
GCF	Gingival crevicular fluid
IL-1	Interleukin-1
IL-6	Interleukin-6
LC-MS/MS	Liquid chromatography coupled to tandem mass spectrometry
MoCA	Montreal Cognitive Assessment
PD	Periodontal disease
PgAgD	Agmatine deiminase from Porphyromonas gingivalis
PI	Plaque index
pTau181	Phosphorylated Tau protein at threonine 181
rRNA	Ribosomal ribonucleic acid
TNF-α	Tumor necrosis factor-alpha