Wickwire EM, Bailey MD, Somers VK, et al. - This study was undertaken to investigate the effect of adherence to continuous positive airway pressure (CPAP) therapy on the risk of stroke among a nationally representative sample of older adults with obstructive sleep apnea. Between 2009 and 2013, researchers conducted a retrospective cohort study among Medicare beneficiaries aged ≥ 65 years who were newly diagnosed with obstructive sleep apnea and had initiated CPAP. A total of 5,757 beneficiaries were included in the final sample. The findings revealed that CPAP adherence was correlated with a significantly reduced risk of stroke in this national analysis of older adult Medicare beneficiaries with obstructive sleep apnea.