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), t and P values.

	UPDRS-III (total)	H&Ya	UPDRS-IIIb (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)
t	4.39	2.05	0.68
P	<0.01∗	0.07	>0.05

∗Significant effect.

^aH&Y = Hoehn and Yahr.

^bUPDRS-III = Unified Parkinson's Disease Rating Scale.