Deep Brain Stimulation of Caudal Zona Incerta and Subthalamic Nucleus in Patients with Parkinson's Disease: Effects on Voice Intensity

Table 1

Characteristics of patients in the two surgical groups. There were no statistical differences between the groups for age, duration since diagnosis, or any of the UPDRS scores.

Patient	Uni/bilateral	Gender	Age at; operation (y)	Duration since; diagnosis (y)	UPDRS III		Speech UPDRS III Item 18
					Off med	On med	Off med	On med
STN1	bi	M	68	9	52	24	2	2
STN2	uni	M	65	7	33	16	1	0
STN3	bi	M	58	7	39	18	2	1
STN4	bi	M	64	5	40	16	0	0
STN5	bi	F	51	8	32	6	1	0
STN6	bi	F	53	8	44	21	1	1
STN7	bi	M	70	4	57	36	2	1
STN8	uni	M	72	6	35	22	0	0
Median (range)			65 (51–72)	7 (4–9)	39.5 (32–57)	19.5 (6–36)	1.0 (0–2)	0.5 (0–2)
czI1	bi	F	66	10	29	15	1	1
czI2	bi	M	70	2	40	42	1	1
czI3	bi	M	71	7	43	24	2	1
czI4	bi	M	62	5	50	27	2	1
czI5	bi	M	49	4	30	14	1	1
czI6	bi	M	50	6	31	10	1	0
czI7	bi	F	62	5	31	16	0	0
czI8	bi	M	52	10	58	25	2	1
Median (range)			62.5 (49–71)	5.5 (2–10)	35.5 (29–58)	20.0 (10–42)	1.0 (0–2)	1.0 (0-1)