Table 1.

Demographic and clinical variables.

	Healthy control subjects (n = 10)	Parkinson’s disease patients, normal cognition (PDNC; n = 10)	Parkinson’s disease patients, low cognition (PDLC; n = 8)
Age (years)	62.8 ± 6.3	66.5 ± 6.8	67.9 ± 7.6
Male/female$	2 M/8F	8 M/2F	6 M/2F
MoCA scores	28 ± 1	28.14 ± 1.2	22.7 ± 1.1***
BDI-II scores	3 ± 3.06	5 ± 3.3	10.7 ± 7.3*
Disease duration (years)	–	9.4 ± 4.9	7.7 ± 4.7
MDS-UPDRS-III	–	20.1 ± 8.4	21.9 ± 10
LEDD total (mg/day)	–	576 ± 698	640 ± 466

Values are listed as mean ± standard deviation.

^$ p  < 0.012 by chi-square test.

*** p  < 0.001 by Mann–Whitney in PDLC vs. PDNC and Healthy control.

* p  = 0.002 by Mann–Whitney in PDLC vs. control.