Studies show bouts of insomnia may predispose individuals to depressive illness. The correlation between sleep disorders and mood disorders holds true across age and gender lines.
Review Date: 3/25/2012 Reviewed By: Timothy Rogge, MD, Medical Director, Family Medical Psychiatry Center, Kirkland, WA. Also reviewed by David Zieve, MD, MHA, Medical Director, A.D.A.M. Health Solutions, Ebix, Inc.