Table 2. Baseline Patient Characteristics.

Characteristic	STN (n = 55)	GPi (n = 41)	p value	Entire sample (n = 96)
Age	64.18±8.85	64.55±8.62	n.s.	64.87±8.86
Disease Duration	11.84±6.12	13.44±7.14	n.s.	12.52±5.63
UPDRS (off-med)	39.69±11.52	43.46±11.88	n.s.	41.3±11.76
UPDRS (on-med)	23.35±10.15	25.80±9.10	n.s.	24.4±9.75
H&Y (on-med)	2.78±0.88	2.38±0.42	n.s.	2.32±0.39
H&Y (off-med)	2.75±0.99	2.88±0.87	n.s.	2.81±.73

Legend: mean ± standard deviation, UPDRS- Unified Parkinson's Disease Rating Scale, H&Y- Hoehn and Yahr Parkinson's Disease Stage.