Hi, BUG!
The dreaming connection is that, in my case at least, my AHI was far higher in REM than non REM. (My Sleep Tech, Laura, has advised that that is quite common). Upon initial diagnosis, my overall AHI was 19, but in REM (when I could still get into REM) it was 83.
So here’s the theory: If you stop remembering your dreams, it’s possible that you have stopped dreaming, because you can no longer maintain REM sleep.
This happened to me at about puberty (the voice box descends in both genders blocking the airway.) But when I asked my Dad if he remembered his dreams he said”no”. (Mom, on the other hand) lived at least three other lives at night.)
Many years later, when I diagnosed my own OSA, I diagnosed Dad’s, but by then it was too late for him to handle the headgear (strokes) or remember when he awoke in the middle of the night why he was wearing a mask on his face(multi-infarct dementia.)
In retrospect, Mom dodged OSA, notwithstanding that her brother and father had bad cases (not formally diagnosed, but in retrospect I recognize clear symptoms) because as a young child she had her tonsils and adenoids removed enlarging her airway.
Mom is still with us, living independently in her own home at 94, but due to vision problems she has given up the car keys. And she still has an active dream life she tells me.