Changes in Vowel Articulation with Subthalamic Nucleus Deep Brain Stimulation in Dysarthric Speakers with Parkinson’s Disease

Table 3

Scores on motor subscale of the UPDRS (no symptoms = 0), Hoehn and Yahr (H&Y, mild = 1) staging during ON- and OFF-stimulation: means (standard deviations), and P values.

	UPDRS-III (total)	H&Y^a	UPDRS-III^b (speech item)
OFF-stimulation	48.3	2.63	2.19
	(16.7)	(0.74)	(0.88)
ON-stimulation	29.7	2.26	2.06
	(9.18)	(1.04)	(0.62)
	4.39	2.05	0.68
	<0.01*	0.07	>0.05

*Significant effect.
^aH&Y = Hoehn and Yahr.
^bUPDRS-III = Unified Parkinson’s Disease Rating Scale.