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 5/5/2018
Updated by: Fred K. Berger, MD, addiction and forensic psychiatrist, Scripps Memorial Hospital, La Jolla, CA. Also reviewed by David Zieve, MD, MHA, Medical Director, Brenda Conaway, Editorial Director, and the A.D.A.M. Editorial team.