FOSQ is a standard questionnaire sleep docs/clinics give you periodically to see how much your condition is affecting your life. It. of course, is very subjective. But it is ONE way to measure your treatment effectiveness. There are 30 "questions" (areas) they use for evaluation. The "1/30" no doubt refers to your score (2 out of 30, etc). The whole thing is probably detailed in your CPAP machine instruction booklet...or at least somewhere in the documentation. I know it was in with my M-series Auto.