Deep Brain Stimulation Frequency of the Subthalamic Nucleus Affects Phonemic and Action Fluency in Parkinson’s Disease

Table 1

Baseline characteristics of the participants.

Variables	Mean SD or (%)	Range
Sex, male	16 (80)	—
Age	56.65 10.71	31–75
Education	10.10 5.23	2–22
Time of disease, years	15.30 4.71	10–29
Levodopa equivalent dose, mg/day	1165.00 615.08	300–2300
Time after surgery, months	2.21 1.38	0–7
MMSE	26.45 2.52	21–30
Hamilton Depression Rating Scale
Normal	14 (70)	—
Mild depression	4 (20)	—
Moderate depression	2 (10)	—
Amplitude (V), left	3.02 (0.65)	1–3.90
Amplitude (V), right	2.98 (0.60)	1.80–3.60
Pulse width (μs), left	79.50 (17.61)	60–120
Pulse width (μs), right	81.00 (17.14)	60–120
Frequency (Hz), left and right	124.00 (26.04)	60–180

SD: standard deviation; MMSE: Mini-Mental State Examination.