I really don't know. The difference is significant, though- before, I was recording ~10 apnea events a night, and now it's ~5. I'm naturally a back sleeper, so I don't move around much either way, so I just don't know. I'm certainly not complaining, though!
Thanks for your input ! I am inclined to believe that proclaimed stress reduction benefits of sleeping with an heavy blanket correlates or explains the reduction in apnea events. I may look into it myself.
I hope they work as well for you as they have for me!
Unrelated to weighted blankets, but related to better quality sleep, I have also found that these pillows help reduce the number of apnea events I have per night as well:
You put the thicker end under your neck. It helps keep your airway open, and is quite comfortable. I will say that you might want to buy locally, though- if you check the reviews, it seems like there are a lot of counterfeits on Amazon. The real ones don't smell, and have a firm level of support.