. Author manuscript; available in PMC: 2014 Oct 22.

Published in final edited form as: J Parkinsons Dis. 2013;3(2):139–144. doi: 10.3233/JPD-130178

Table 1.

Demographic information on tested groups.

	Controls	PD-DA	PD+DA	DBS-DA	DBS+DA	t statistic χ ² or F-statistic	p-value
Participants(no.)	18	14	20	11	16
Gender (male)	15	11	19	10	11	χ ²=5.1	0.27
Age (yrs)	58.9±12.8	67.2±7.5	64.3±5.2	57.0±7.0	59.1±11.6	F=3.0	0.023
Age PD of diagnosis		61.1±2.2	53.2±1.8	42.5±2.3	43.7±2.2	F=15.9	<0.001*
PD Disease duration (yrs)		6.2±3.8	11.1±7.0	14.4±5.0	15.6±6.0	F=7.3	<0.001*
DBS (yrs)				3.4±3.3	3.6±2.2	t=0.2	0.8
Education (yrs)	13.6±3.2	14.8±3.1	14.5±2.5	13.9±2.8	13.7±2.8	F=0.4	0.75
LEU dose(mg/day)		511±321	854.2±356	739.2±409	771.4±337	F=2.6	0.058
DA dose (LEU)			216.0±109		204.9±97.1	t=0.3	0.7
UPDRS on		16.0±2.3	19.4±11.6	16.5±4.4	17.6±4.4	F=0.5	0.6
DA duration (yrs)