Progression of MDS-UPDRS Scores Over Five Years in De Novo Parkinson Disease from the Parkinson’s Progression Markers Initiative Cohort

The Movement Disorder Society‐Sponsored Revision of the Unified Parkinson's Disease Rating Scale (MDS‐UPDRS) is a commonly used tool to measure progression in patients with Parkinson's disease (PD). Longitudinal changes in MDS‐UPDRS scores in patients with de novo PD have not been established. The objective of this study was to determine progression rates of MDS‐UPDRS scores in de novo PD.