The Effects of Practice on the Concurrent Performance of a Speech and Postural Task in Persons with Parkinson Disease and Healthy Controls

Table 1

Participant demographics.

	Groups
Variable	HY group	AM group	PD group
n(gender)	10 (M = 4; F = 6)	7 (M = 5; F = 2)	7 (M = 7; F = 0)
Age	25.50 (2.40)	70.50 (11.90)	68.70 (9.20)
Time since diagnosis			4.11 (2.31)
Disease severity* (modified HY)			2 (1.5–3)
Taking carbidopa/levodopa			Yes: 6; No: 1
Dysarthria severity (1–10)*			4.1 (1–7)
6-month fall history			>2 falls: 3; 0–2 falls: 4

HY group: healthy young adult controls; AM group: healthy age-matched controls; PD group: persons with PD.
∗Median (range).