TABLE 1.

Patients’ demographics and clinical information.

Characteristics	Total	GPi	STN
	(N = 38)	(N = 20)	(N = 18)
Male	25	12	13
Female	13	8	5
Age at PD onset (year)	48.5 ± 11.1	52.0 ± 8.0	45.7 ± 11.4
Age at the time of surgery (year)	58.8 ± 11.2	62.0 ± 9.1	55.9 ± 12.3
Disease duration* (year)	10.2 ± 3.8	10.0 ± 3.9	10.3 ± 3.2
Hoehn–Yahr stage
Off-medication	3.2 ± 0.9	3.3 ± 0.9	3.2 ± 0.9
On-medication	2.6 ± 0.8	2.7 ± 0.9	2.4 ± 0.8
Last follow-up (month)	7 (6–12)	12 (6–13.5)	6 (6–8)
Presence of dyskinesia	20 (53%)	9 (45%)	11 (61%)
L-dopa equivalent dose (mg/day)	747.0 ± 302.7	761.4 ± 247.9	731.8 ± 360.5

Continuous variables are presented as means ± SDs or medians with interquartile ranges. Categorical variables are presented as frequencies (%). *Defined as the amount of time since self-reported onset of motor symptoms. GPi, globus pallidus interna; STN, subthalamus nucleus.