Psychological issues in sleep apnea.

The overlap of sleep disorders with various psychiatric problems is so great that one would suspect that both types of problems may have common biologic roots. An estimated 65% to 90% of adults with major depression experience some kind of sleep problem. Sleep problems also increase the risk for developing depression. Since the early days of research on disturbed sleep, clinical studies have suggested the existence of a relationship between depression and obstructive sleep apnea.