Longitudinal Outcomes of DBS in PD

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.