When someone is depressed and having suicidal thoughts or their depression treatment just isn’t working, their caregivers might want to check to see if they have obstructive sleep apnea, investigators say.

That’s true even when these individuals don’t seem to fit the usual profile of obstructive sleep apnea, which includes males who are overweight, snore and complain of daytime sleepiness, says Dr. W. Vaughn McCall, chair of the Department of Psychiatry and Health Behavior at the Medical College of Georgia at Augusta University.