| Sumario: | Aim: To examine the longitudinal loss of independence (LOI) in Parkinson disease (PD) and introduce event visualization as a research tool. Methods: Early-stage PD patients seen by a movement disorders specialist from 2003–2020 were included. LOI, defined as needing help with activities of daily living (ADLs), was assessed using the modified Older Americans Resources and Services Daily Function Questionnaire. EventFlow software visualized LOI patterns. Results: The cohort included 296 patients (mean age 60.8; 61% male; 94% Hoehn & Yahr stages 1–2). At baseline, 91% were independent. LOI occurred in 133 patients for ≥ 1 ADL, and in 95 patients for ≥ 3 ADLs. Housework was the most frequent first ADL needing help (58 of 133), with a mean onset of 4.6 years. Among those with LOI, 57 (43%) regained independence at least once. Conclusion: LOI in PD shows both transient and persistent patterns. Event visualization may aid understanding of progression and support patient counseling. Plain Language Summary: People with Parkinson disease (PD) often worry about losing their ability to do everyday tasks on their own. In this study, we followed nearly 300 individuals with early-stage PD over several years to understand how their independence changed over time. We looked at when they first began needing help with daily activities, such as preparing meals, shopping, or housework. During the study, we found that almost half of the patients reported needing help with at least one task – most often housework. However, many of them later regained their independence, sometimes more than once. Our findings suggest that some people improve after their independence loss, possibly with treatments or supports. This information may help people living with PD – and their families – better understand what to expect and how to prepare for the future.
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