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

Table 5

The interaction effects for the two groups combined and the differences for the interaction variables between the groups, when the ambiguous item “redden” (to save) was removed from the dataset. Scores correct (median and interquartile range) for sentence comprehension of specific sentence types, obtained for the PD and healthy control subjects.

Interaction variables	PD patients	HC subjects	Both groups combined		Differences between groups
Sentence types	Median (IR)	Median (IR)	𝑍	𝑃	𝑍	𝑃
Matching × length			−3.182	.001*	−.440	.660
Congruent short	17.5 (1)	18 (1)
Congruent long	18 (1)	18 (0)
Incongruent short	18 (1)	18 (0)
Incongruent long	17 (1.75)	18 (1)
Syntactic complexity × length			−.390	.697	−.405	.686
Active short	18 (.75)	18 (0)
Active long	18 (1)	18 (0)
Passive short	18 (2)	18 (1)
Passive long	17 (1.75)	18 (1)
Matching × syntactic complexity			−.939	.348	−1.113	.266
Congruent active	18 (1)	18 (0)
Congruent passive	17 (1.75)	18 (1)
Incongruent active	18 (.75)	18 (0)
Incongruent passive	17 (2)	18 (1)
Matching × length × syntactic complexity			−3.322	.001*	−.291	.771

The maximum possible per sentence type is 18. Statistical significance is indicated as follows: *𝑃≤.001. See Appendix B for a detailed description of the procedures to calculate the scores for the different sentence types.
HC: healthy control, IR: interquartile range.