Tom,

Wow that is a lot of people. I am on 02 at night and have been 4ish years. I don't seem to have had serious lung issues so something tells me with all the sinus issues just not enough air coming through. I don't have an issue in the day or at least didn't seem to be when tested. I have an idea that a lot of wegs may need the 02 and not aware of it. My wegs doc didn't check my 02, but a doc that was into natural cures did. I was put on it right away, not super low at night just enough that I needed it for sure.
,
I have also read that it was more prevalent in Caucasians, that would be interesting to know the ratio's. A cure would be wonder, they will get the answer one day.