Aβ42	amyloid-β42
AD	Alzheimer′s disease
CSF	cerebrospinal fluid
ELISA	enzyme-linked immunosorbent assays
HY	modified Hoehn & Yahr classification
NfL	neurofilament light chain
MDS	Movement Disorder Society
MMSE	Mini-Mental State Examination
p-α-syn	α-synuclein phosphorylated at residue Ser 129
PD	Parkinson′s disease
PD-MCI	Parkinson′s disease mild cognitive impairment
p-tau	tau phosphorylated at threonine 181
RAVLT	Rey Auditory Verbal Learning Test
t-α-syn	total α-synuclein
t-tau	total tau
TMT	Trail Making Test
UPDRS III	Unified Parkinson′s Disease Rating Scale Part III
VAT	Visual Association Test