thanks for replying. yes, i'm looking at daily median value. some nights, i'm breathing in twice as long as long (or worse) than i'm breathing out. this is not healthy, but i don't have any other issues like asthma or copd, so i'm wondering, what is this problem? i've used auto (4-20) pressure on my resmed (the state of the art autopap), and i've tried steady pressure at 12, 13, and 14 with EPAP of 2. i'm going to keep trying different things, like less pressure and less EPAP, but it's been over two years now and i am having a hard time making this work. i've tried combining different oral appliances as well, which can make it worse. my tidal volume and resp. rate vary but they seem abnormal as well for my height and weight.