Table 10. Brief demographic information for the enrolled subjects.

Group (n)	NC (31)	Patient (83)*	PD/PDD (52)	AD (31)
Female%	80.0	56.5	61.7	48.0
Age (years)	60.3 ± 7.2	66.8 ± 10.3	62.6 ± 9.5	74.6 ± 9.6
MMSE	28.0 ± 1.9	23.2 ± 5.3	24.8 ± 4.6	20.2 ± 5.3
H-Y stage	-	-	1.96 ± 0.98	-
NFL (pg/ml)	7.70 ± 4.00	17.11 ± 8.39	15.85 ± 7.82	19.24 ± 8.99

*: Patient includes PD/PDD and AD NC: normal control PD: Parkinson’s disease

PDD: Parkinson’s disease dementia AD: Alzheimer’s disease

MMSE: Mini-Mental State Examination

H-Y stage: Hoehn and Yahr stage