Reliability of Average Daily Steps Measured Through a Consumer Smartwatch in Parkinson Disease Phenotypes, Stages, and Severities: Cross-Sectional Study

Edoardo Bianchini   ^{1, 2} , MD ;   Domiziana Rinaldi   ¹ , MD ;   Lanfranco De Carolis   ¹ , MD ;   Silvia Galli   ¹ , MD ;   Marika Alborghetti   ¹ , MD ;   Clint Hansen   ^{2, 3} , PhD ;   Antonio Suppa   ^{4, 5} , MD ;   Marco Salvetti   ^{1, 5} , Prof Dr Med ;   Francesco Ernesto Pontieri   ¹ , Prof Dr Med ;   Nicolas Vuillerme   ^{2, 6} , PhD

¹ Department of Neuroscience, Mental Health and Sensory Organs (NESMOS), Sapienza University of Rome, Rome, Italy

² AGEIS, Université Grenoble Alpes, Grenoble, France

³ Department of Neurology, Kiel University, Kiel, Germany

⁴ Department of Human Neurosciences, Sapienza University of Rome, Rome, Italy

⁵ IRCCS Neuromed Institute, Pozzilli, Italy

⁶ Institut Universitaire de France, Paris, France