Table 2.

SPARE-AD score and global cognitive performance^a

Models	Unstandardized coefficients		Standardized coefficients	t	P-value
	B	Std. Error	Beta
Model 1b
Age	−0.102	0.207	−0.054	−0.495	0.62
PD duration	−0.516	0.267	−0.199	−1.935	0.06
Hoehn and Yahr stage	−4.851	1.824	−0.288	−2.659	0.01
PIGD subtype	−0.633	2.638	−0.023	−0.240	0.81
SPARE-AD score	−4.841	1.748	−0.310	−2.769	0.007
Model 2c
Age	−0.068	0.213	−0.036	−0.320	0.75
PD duration	−0.625	0.263	−0.241	−2.380	0.02
UPDRS motor score	−0.285	0.127	−0.233	−2.242	0.03
PIGD subtype	−1.562	2.649	−0.058	−0.590	0.56
SPARE-AD score	−5.454	1.721	−0.350	−3.169	0.002

a Total raw DRS-2 score.

b Linear regression model with baseline DRS-2 score as dependent variable and Hoehn and Yahr stage as measure of disease severity [F = 8.53 (df = 5,77), P < 0.001].

c Linear regression model with baseline DRS-2 score as dependent variable and UPDRS motor score as measure of disease severity [F = 7.95 (df = 5,77), P < 0.001].

PD = Parkinson's disease; PIGD = postural instability–gait difficulty.