Table 1. Demographic data on patients and healthy controls.

	Healthy controls	Parkinson’s disease
	n = 20	n = 37
Gender men/women	10/10	22/15
Age in years (s.d.)	63 (9)	65 (10)
UPDRS part III (motor)	n/a	22.3 (7.7)
Disease duration (yr)	n/a	6.5 (3.9)

Notes: UPDRS = Unified Parkinson’s Disease Rating Scale.