Hmm.
My BMI is currently 37.7, down from a high of 39.6.
For me, a 40 BMI (Morbidly Obese) = 329 lb.
35 BMI (Severely Obese) = 288 lb.
30 BMI (Moderately Obese) = 246 lb.
25 BMI (Merely Overweight) = 205 lb.
Best shape I've ever been in my life at this height was when I first reached this height and was on tour with a drum and bugle corps the entire summer, rehearsing and performing. Heckuva great workout, and we were fed healthy food. At that point - Again, *just* having grown to my adult height - I weighed 180, for a BMI of 21.9. I had so little body fat, you could see the blood vessels standing out on my arms, and you could see my ribs too. But, if I'd lost another 28 lbs. I'd have still been considered healthy.
I've suspected some possible issues with OSA in the past when I was at my peak weight - But that's because I was told I snored a lot, and occasionally, I'd snort and wake myself up as I was falling asleep. I've never felt really tired during the day, and can easily go for 20 hours after a good night's sleep before I start to feel tired.
What I really dread is a possible diagnosis of "mild" OSA. That's the worst of all. If your problem is more severe, you get a CPAP and you get your SI. If they don't decide it's bad enough for the machine, you get to do the maintenance of wakefulness test like one friend of mine. He described it to me, and it sounds like even someone with no OSA at all who got a great night's sleep would have trouble staying awake!
I also don't look forward to the time, cost, and hassle of getting the study done - I just happen to have an 18" neck, so despite my BMI being a few points lower than they're casting the net right now, I'm gonna have to do it. This really does seem like a witch hunt.