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I am pretty sure that my machine is not picking up the RERA's, as the flow limitations reported by the machine are very low in quantity.
So, I think my arousals are due to RERA or some similar sleep disordered breathing that is triggering arousals but not picked up by the machine.
The reason I think so, the arousals that were recorded during my titration in clinic were not correlated with the machine.

Another evidence that the machine is not picking them up: Whether I use a pressure of 4, 6, 8, 10 or 12, the pattern is the same.
My machine will stay around the pressure level set, and then drift up a few cm during the night.

Finally, I am actually convinced cpap is critical for my health.
WIthout cpap, I am a zombie.

With Cpap, I do better and get along, but am definitely not thriving.

Now I will start an experiment. Starting at 8cm H20, I will move up 0.5 cm H20 every week, working from 8cm up to 12 cm.
I will keep a diary, and I will analyze very carefully the data in Sleepy Head and look for trends.

Any hints about what to look for in sleepy head would be great.

I wish you success in your experiment. Maybe time lapse video recordings of your sleeps would useful in helping you determine what's occurring. Many lap tops these days include time lapse capability with their webcams. For some ideas, see the links in my signature.
Jay