So is major weight loss in obese people.
I use to think that too, but when I took my sleep test, I saw a number of people who were rail thin needing CPAP machines, being obese is a factor, but so is the physical makeup of the person, some are just prone to needing a CPAP machine.
My sister in law is maybe 5-7, 120lbs and has to wear one.
I also think sleep position has something to do with needing a CPAP machine, side sleepers I think are less prone and back sleepers are more prone to needing a CPAP machine.
The other thing that I know helps is a sleep number or mattress where you can raise your upper body to a slight angle, especially if you are a back sleeper like myself, that ever so slightly causes your lower jaw forward at night.
What I want to know is why there’s no surgical fix.