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This study examined whether diet quality and physical activity levels before and after Parkinson disease (PD) diagnosis are associated with all-cause mortality. The study focused on male participants from the Health Professionals Follow-up Study (1986 to 2012) and female participants in the Nurses' Health Study (1984 to 2012). Diet quality was measured with the validated Alternative Healthy Eating Index (AHEI), and activity was measured with validated questionnaires, converted to metabolic equivalents (METs). Mortality was the primary outcome variable.
During follow-up, 1251 participants (52.1% male) were diagnosed with PD. Better diet, measured both before and after PD diagnosis, was associated with lower mortality (adjusted hazard ratio fo…