Predictors of Functional and Quality of Life Outcomes following Deep Brain Stimulation Surgery in Parkinson’s Disease Patients: Disease, Patient, and Surgical Factors

Table 2

Patient Global Impression of Change Scale (PGIS) and Clinician’s Global Impression of Change Scale (CGIS) results by various categorical predictors.

	% PGIS much improved or very much improved (proportion)	value	% CGIS much improved or very much improved (proportion)	value
Tremor	76.9% (20/26)	0.7566	84.0% (42/50)	0.0075
No tremor	82.1% (32/39)		60.0% (42/70)
Dyskinesia	83.7% (36/43)	0.5167	64.2% (52/81)	0.0380
No dyskinesia	75.0% (18/24)		83.7% (36/43)
Freezing	78.8% (26/33)	0.7591	61.9% (39/63)	0.0315
No freezing	82.4% (28/34)		80.3% (49/61)
Falls/balance	75.0% (21/28)	0.3688	66.1% (41/62)	0.3218
No falls/balance	84.6% (33/39)		75.8% (47/62)
Left unilateral	75.0% (6/8)	1.0000	63.6% (7/11)	1.0000
Right unilateral	77.8% (14/18)		67.6% (23/34)
Unilateral	76.9% (20/26)	0.7906	66.7% (30/45)	0.7741
Two-stage bilateral	81.5% (22/27)		73.1% (38/52)
Unstaged bilateral	85.7% (12/14)		73.1% (19/26)