Obstructive sleep apnea (OSA) is associated with a significantly increased risk of developing Parkinson disease (PD); however, implementation of treatment with continuous positive airway pressure (CPAP) devices mitigates this risk successfully. These are the results of a study to be presented at the 2025 American Academy of Neurology (AAN) annual meeting, held from April 5 to 9, 2025, in San Diego, California.