Sentence Comprehension and Its Association with Executive Functions in Patients with Parkinson's Disease

Table 4

Neuropsychological performance measures (median and interquartile range) obtained for the healthy control subjects compared to the PD patients.

Neuropsychological tests	PD patients		HC subjects		PD ≠ HC
	Median	IR	Median	IR	𝑍	𝑃
Sustained visual attention	0	2	0	0	−3.055	.002**
Sustained auditory attention	0	1	0	1	−.747	.455
Digit span backward	7	4	7	3	−.803	.422
Set switching (TMT A & B; OMO test)	−.01	1.19	−.35	.64	−2.518	.012*
Interference index Stroop	1.61	.43	1.54	.45	−.977	.329
Sequencing Complex (max = 20)	19	2	19	2	−.782	.434

Statistical significance is indicated as follows: *𝑃≤.05, **𝑃≤.01.
HC: healthy control.