So
last night I set it to CPAP mode at a pressure of 9 with EPR off @bonjour - it *did* flow limit). My AHI was 1.31 for a total time of 7:34. At first glance, those numbers looks good. The interesting thing is that the 7:34 was broken up into 7 small sessions, with the longest two being 1:54 and 2:04; I was up and down quite a bit during the night. This is somewhat consistent with the previous night where my APAP range was set to 10-16 with EPR off; my AHI was 0.87 for a total sleep time of 5:34 broken into 7 shorter sessions.
This is in contrast with two nights ago where APAP was set to 10-16 with EPR of 2. My AHI was up at 2.56, but I had only 4 sessions that averaged longer.
So, when EPR is off and EPAP stays constant at 9 or 10, my AHI may be lower, but I seem to get up and down all night.
However, with EPR on, my AHI may be slightly higher, but I get up and down less, and each of my sleep sessions last longer.
The question is: why? Why do I get up more when my EPAP is fixed at 9? Is it due to comfort? If so, then EPAP pressure must be disturbing me more than I realize - because I don't consciously notice much discomfort when EPR is off.
I'm not sure which scenario is better. If I had to choose, I'd be inclined towards the higher AHI with less getting up and down at night. Waking up to pee has been a major complaint throughout most of my life - so the less I do that, the better I seem to feel.
The next frontier is to try and get my AHI down *with* longer sleep sessions. Any feedback is appreciated.