Table 1 Demographic and clinical variables, mean (standard deviation)

Male to female

25:15

14:7

35:6

χ² = 5.8, p = 0.06^a

Age

73.4 (6.6)

74.7 (7.2)

74.6 (6.5)

F(2, 99) = 0.4, p = 0.66^b

AChEI

–

20

35

χ² = 1.4, p = 0.25^c

PD meds

–

0

28

χ² = 26.2, p < 0.001^c

Duration

–

4.1 (2.4)^f

3.2 (2.1)^g

U = 270, p = 0.07^d

MMSE

28.8 (1.1)

21.6 (3.7)

23.1 (3.8)

t₆₀ = 1.5, p = 0.15^e

UPDRS III

3.9 (4.2)

1.7 (1.5)

20.2 (8.6)

t₆₀ = 9.7, p < 0.001^e

CAF total

–

0.3 (0.7)^h

5.2 (4.3)^j

t₅₆ = 5.1, p < 0.001^e

Mayo total

–

9.4 (4.4)^h

14.3 (5.5)^j

t₅₆ = 3.5, p = 0.001^e

Mayo cogn

–

2.0 (1.9)^h

3.0 (1.8)^j

t₅₆ = 2.0, p = 0.05^e

NPI total

–

7.4 (7.2)^h

14.5 (10.5)^g

t₅₈ = 2.7, p = 0.009^e

NPI hall

–

0.05 (0.2)^h

2.0 (2.0)^g

t₅₈ = 4.5, p < 0.001^e