Well that might be a result from nobody ever coming in for the study without very bothersome symptoms. Not a random sample in other words but a preselected one.
As it happens, I got a "negative" sleep study myself. I have rare instances of waking up unable to breath at all. I have to sit bolt upright in bed and slap myself awake before my lungs will restart. Plus hubby said I snore so I went in for a study. They found zero OSA, I passed with flying colors. Naturally the event which concerned me didn't happen that particular night so they didn't catch it. But the physician (the certified sleep specialist, not my GP) told me he'd only seen one or two cases like mine ever, and he postulated that it was a kind of central thing, not central sleep apnea per se, but something related neurologically, where the wires get crossed when you're in REM and your body is paralyzed so you don't run around acting out your dreams. Your breathing muscles aren't supposed to be stopped, but he thinks that's what happens, fortunately very rarely, in my case and the couple others he had.
Anyway that's what he said, I have no idea if he is right or wrong, or just trying to put some kind of positive diagnosis on my study, but in my case there was no money to be made selling me a CPAP. Hey I wonder if that kind of thing is what's behind SIDS deaths?
