It included 180,982 people with newly diagnosed Parkinson's disease and more than 18.8 million control participants living within five miles of a dry cleaner. The Finding and Its Distance GradientResearchers used Medicare data from 2014 through 2018, identifying new Parkinson's cases among beneficiaries aged 67 and older. The same research group previously reported a separate association between residential proximity to golf courses and Parkinson's odds, which MedicalDaily covered when it was published. Living near a dry cleaner is also correlated with living in denser commercial areas, which carry other exposures. Associations were larger for Parkinson's cases with prior gait disturbance, dementia or cognitive decline, and falls.