Table 2.

Cube Scoring according to the classical evaluation (evaluated with one point) and extended evaluation system of the cube (evaluated with six points; divided into two intermediate scores: IS₁ (assesses retrograde procedural memory) and IS₂ (assesses the visuo-constructive functions)

		Descriptive statistics				p
	Variable	PD (n = 201)		CS (n = 201)		PD vs. CS
		Mean	SD	Mean	SD
Extended evaluation	IS1 (/3)	2.05	1.13	2.43	0.90	0.008*,**
system of the Cube	IS2 (/3)	2.26	1.10	2.59	0.84	0.013*,**
Copying Test
Classical evaluation score	% of participants	Mean	Mean
of the Cube Copying	with correct	65.67	83.58	< 0.001*,**
test (Nasreddine et al.)	result
[12]

The Cube Copying total score (classical evaluation system) on one point evaluates the final result of the cube; one point is administered if the copy is identical to the model. In the extended evaluation system: the first intermediate score (IS₁) evaluates the drawing procedure. The second intermediate score (IS₂) evaluates visuo-constructive functions. SD, standard deviations; PD, participants with Parkinson’s disease; CS, control subjects; IS, intermediate score. ^*Significant at the 5% level (2-tailed). ^**Significant at the Bonferroni-adjusted 5% level (p < = 0.05/3).