Noninterventional Study Evaluating Parkinson's Disease Diary Use

This is a global, multi-center, noninterventional study of patients with PD aged ≥39 to ≤70 years under standard-of-care treatment that will enroll a minimum of approximately 150 participants and up to 400 participants. Participants will be assigned (1:1) to complete the PD diary either on 3 consecutive days in 1 week (Group A) or 2 consecutive days in each of 2 consecutive weeks (Group B) for a given study visit. During the study, data are collected on motor function, quality of life, and use of PD medications at Baseline and at 3, 6, 12, 18, and 24 months.