. Author manuscript; available in PMC: 2016 Oct 3.

Published in final edited form as: Mov Disord Clin Pract. 2016 Jan 18;3(5):465–471. doi: 10.1002/mdc3.12309

Table 1. Demographic and Disease Characteristics of Subjects with and Without Deep Brain Stimulation. Values reported are mean ± SD.

Variable	DBS Group (n = 100)	Non-DBS Group (n = 684)	P
Age of onset	40.3 ± 7.1	41.7 ± 6.9	0.06
Age at baseline evaluation	56.7 ± 7.9	51.6 ± 9.1	<0.0001
Disease duration, y	16.5 ± 6.8	9.9 ± 7.8	<0.0001
AJ ancestry, % of subjects	15.0	15.8	0.81
Ethnicity, %^a
White	83.0	82.0	0.51
African-American	0.0	15.0
Hispanic	13.0	12.3
Other	4.0	3.51
UPDRS-III^b	24.8 13.1	20.3 11.7	0.002
MMSE^c	28.8 ± 1.9	28.9 ± 2.1	0.22
Prior history of dyskinesia, % of subjects^d	78.3	37.9	<0.0001
Prevalence of mutation carriers, %^e	26.5	16.8	0.019

Non-DBS, n = 683.

DBS, n = 89; non-DBS, n = 641.

DBS, n = 97; non-DBS, n = 664.

DBS, n = 83; non-DBS, n = 475.

DBS, n = 98; non-DBS, n = 661.

SD, standard deviation; DBS, deep brain stimulation; AJ, Ashkenazi Jewish; MMSE, Mini Mental Status Examination; UPDRS-III, the motor subsection of the Unified Parkinson's Disease Rating Scale.