Levodopa Use and Characteristics of Freezing-of-Gait in Patients With Parkinson Disease in the NS-Park and PPMI Cohorts.
BACKGROUND AND OBJECTIVES Recent reports have suggested that levodopa exposure may contribute to freezing of gait (FOG), but this relationship remains controversial because of confounding by disease severity and duration. Our goal was to assess the relationship between levodopa use and FOG incidence and severity. MET...