Answer: First of all I have sleep apnea and have done a lot of research on it. My personal response to treatment for sleep apnea, the breathing of air throught the night with a CPAP did absolutely give me a more positive outlook on life! It actually made me feel years younger, I suppose for years I was sleep starved and not actually depressed but not at my best! God only knows what I could of accomplished if I would of had this machine 20 years ago!Blossom I have known two people who were diagnosed with depression and one of the things that they also had was sleep apnea. Now their treatment of sleep apnea did improve their depression, one more than the other. Now this person still has her days, she doesn't dance thru life throwing out flowers! But she is definitely happier overall! Now the other one had much bigger problems also! I think he just had bad attitudes for other reasons!