Until recently when robysue (and Pugsy too) explained to me how the machine often scored wake breathing as negative events, I have taken the position that it was better to just leave the mask on when awake in the hope that I might eventually fall back asleep and get some benefit from it. But it is evidently wreaking havoc with my AHI numbers! Witness two back to back nights, each of session duration a little over 4 hours and each with 0% Large Leaks reported by Encore and my machine.
Here's the first night. I know for a fact that I only slept for about the first hour and a half until I got up to go to the bathroom, with a short drift off of maybe 20 minutes right at the end. But I spent close to 2 hours after my bathroom break wide awake, conscious of every breath. And look where all the AHI damage came-during that period when I was awake!

But take a look at the very next night. Same mask, no LLs, but I slept straight through for 4 hours and look at the difference in the reported AHI!

In reality there likely really wasn't much difference in the actual sleeping AHI, and I wouldn't think I had any events while awake. So excepting lack of sleep, I don't see much difference in the efficacy of therapy between these two nights. And I should say I felt really good after each night. But it bothers me that the number is so high when this happens. I hate seeing it there and it screws up my averages. And when the doc reviews my therapy he just looks at average numbers and really doesn't have time or the desire to listen to explanations.
So what would you do? Get over worrying about the numbers and lay there and hope to get back to sleep at some point, or cash in for the night and preserve the actual sleep numbers?
Also, as an adjunct question, is there anything magic about the 4 hour therapy session other than insurance compliance in the beginning? Does the doc's version of Encore throw out sessions <4 hours? I see that EB does flag them as such.