Dual-Task Interference: The Effects of Verbal Cognitive Tasks on Upright Postural Stability in Parkinson's Disease

Table 1

Clinical features of individuals with Parkinson's disease.

Subject	Gender	Age (y)	Duration of Illness (y)	Hoehn & Yahr	UPDRS III	Medication	Dosage total/day
PD1	Female	67	2	1.5	19	None	—
PD2	Male	78	8	2.5	36	Levodopa/Carbidopa	650 mg
						Pramipexole	2.25 mg
PD3	Male	69	3	2.0	23	Levodopa/Carbidopa	350 mg
PD4	Male	58	4	2.5	24	Pramipexole	1.5 mg
PD5	Female	50	9	2.5	20	Levodopa/Carbidopa	400 mg
						Ropinirole	9.5 mg
PD6	Male	60	2	1.5	17	Pramipexole	1.5 mg
PD7	Female	76	3	2.5	26	Levodopa/Carbidopa CR	400 mg
PD8	Male	59	5	2.0	26	Levodopa/Carbidopa	300 mg
						Pramipexole	3.0 mg
PD9	Male	49	4	2.0	28	Ropinirole	12.0 mg
PD10	Female	67	8	2.0	21	Levodopa/Carbidopa CR	200 mg
						Levodopa/Carbidopa	200 mg
PD11	Male	67	6	2.5	21	Levodopa/Carbidopa	1000 mg
						Pramipexole	2.0 mg
PD12	Male	68	5	2.0	28	Levodopa/Carbidopa	400 mg
						Pramipexole	0.75 mg
						Entacapone	800 mg
	Mean	64.00	4.92	2.13	24.08	—	—
	(SD)	(9.08)	(2.39)	(0.38)	(5.16)