Table 1.

Preoperative demographic and medical characteristics.

Variables		Mean ± SD	Range
Age (years)		61.1 ± 8.7	48.0–82.0
HYRS		3.6 ± 0.7	2.5–5.0
Duration of illness (years)		11.7 ± 6.4	5.0–30.0
		Number	Percentage (%)
Sex	Male	6	30.0
	Female	14	70.0
Family history of PD		4	20.0
Smoking		3	15.0
Alcohol intake		4	20.0
Drugs addiction		2	10.0
Hypertension		5	25.0
Coronary artery diseases		1	5.0
Diabetes Mellitus		2	10.0

Total = 20; HYRS Hoehn and Yahr Rating Scale; PD Parkinson’s disease; SD standard deviation; % percentage of change