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. Author manuscript; available in PMC: 2017 Aug 1.
Published in final edited form as: Parkinsonism Relat Disord. 2016 Jun 7;29:35–41. doi: 10.1016/j.parkreldis.2016.05.033

Figure 2. Scheduled Stimulation Parameters and Clinical Outcomes.

Figure 2

Demographic information, scheduled stimulation parameters, and long term outcomes. The duty cycle is based on times of the day when patients reported the greatest interference of tics with activities of daily living. Stimulation parameters reflect settings for leads in both left and right hemispheres, unless otherwise specified (L= Left, R=Right). Percent improvements in YGTSS and MRTRS total scores reflect change from pre-surgical baseline at 24-month follow-up. Responders achieved >40% improvement in either YGTSS or MRTRS total scores at month 24. *Subject 1 was lost to follow-up; long term results presented here reflect the final evaluation (month 18).

†Stimulation parameters were modified on a monthly basis for the first 6 months of the study. Here we present means for stimulation parameters in months 0–6. Parameters from individual months (including duty cycles) are available in Okun, et al, 2013. YGTSS= Yale Global Tic Severity Scale; MRTRS= Modified Rush Tic Rating Scale.