Reason for high Clear Apnea

Posting some snap shots of the Jan 2013 sleep study from akj per his request. Not quite all the pages but all I could get good images of
PLMD was pretty much negative so didn't copy it.
Diagnosis was OSA. A handful of centrals were noted on both the diagnostic study and a few more on the titration study but the time spent in the titration study was also a little longer. Apparently the numbers of centrals were low enough to not be worrisome for the doctor.

He was wondering if there is any thing here that stands out to anyone.
So here are the images. I snipped out personal or private information. Should be 7 of them.