AD	Alzheimer’s Disease
CSF	Cerebrospinal fluid
DOR	Diagnostic odds ratio
ELISA	Enzyme-linked immunosorbent assay
IQR	Interquartile range
LR−	Negative likelihood ratio
LR+	Positive likelihood ratio
MCI	Mild cognitive impairment
MS	Mass spectrometry
NFT	Neurofibrillary tangles
NPV	Negative predictive value
HPLC	High-performance liquid chromatography
EC	Electrochemical detection
DNPH	2,4-dinitrophenylhydrazide
SD	Standard deviation
PLS	Partial least squares
PPV	Positive predictive value