This article says ". . . stroke patients diagnosed with sleep apnea saw greater improvements in both neurological symptoms and daily ability to function when they used CPAP compared to patients with apnea who only received usual medical care."
The problem with this is that treating sleep apnea with CPAP (or other treatment) is not seen as "usual medical care," by the author of this article.
Link ===> https://kdal610.com/news/articles/2018/ ... -outcomes/