Longitudinal Outcomes of DBS in PD

Study Overview
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Brief Summary
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Vanderbilt University Medical Center is one of the largest-volume DBS centers in the country. From 2007 through October 2017, 265 Parkinson's disease (PD) patients underwent deep brain stimulation (DBS), 168 of those implanted in subthalamic nucleus (STN) and 97 in globus pallidus interna (GPi). Pre-operatively, each patient is extensively evaluated with a battery of validated motor, cognitive, and mood instruments. This information is stored in RedCAP, a secure online database platform. In an attempt to capture longitudinal outcomes in this population of interest, we will recruit all PD patients two years or more status post DBS who are receiving regular care at Vanderbilt University Medical Center. Study participants will undergo a condensed evaluation of motor function (Unified Parkinson's Disease Rating Scale Part III), cognitive performance (Mini-Mental Status Examination), mood (Beck Depression Inventory), and quality of life (Parkinson's Disease Questionnaire-39). These results will be compared to baseline measures performed pre-operatively, allowing for assessment of interval change. STN and GPi DBS patients will be analyzed separately.

Detailed Description
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Patients will be recruited from review of movement disorders neurologists' outpatient census. All patients with PD two or more years status post DBS will be contacted via phone and/or mailed letter. Any interested patient will be mailed or e-mailed (via RedCAP) a copy of the study informed consent form. Willing patients will present to the Vanderbilt Movement Disorders Clinic for an opportunity to inquire further about the study and sign the informed consent form in person. Participants will have a single study visit, ideally coordinated with their regularly scheduled neurology follow-up. During the study visit, the following evaluations will be performed by a trained research assistant: Video-recorded UPDRS III BDI MMSE PDQ-39 In addition, current PD medications and number of falls in the past 6 months will be recorded. Assessments will occur in the on-medication, on-DBS state. The video-recorded UPDRS III will be reviewed and score at a subsequent date by a blinded rater (movement discord trained neurologist).

Official Title
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Longitudinal Outcomes of Deep Brain Stimulation in Parkinson's Disease

Conditions
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Parkinson Disease

Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: diagnosis of Parkinson's disease status post deep brain stimulation (DBS) implantation in the subthalamic nucleus (STN) or globus pallidus interna (GPi) at Vanderbilt University Medical Center Exclusion Criteria: - unable to complete study assessments
Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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No

Study Plan
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How is the study designed?
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Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| STN<br>Patients with Parkinson's disease who have undergone subthalamic nucleus (STN) DBS. | |
| GPi<br>Patients with Parkinson's disease who have undergone GPi (GPi) DBS. | |

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Unified Parkinson's Disease Rating Scale, Part III (UPDRS III) | Parkinson's disease motor assessment | at least 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Deep Brain Stimulation, Longitudinal Outcomes, Subthalamic Nucleus, Globus Pallidus Interna