Insomnia Review

First created | 05/12/2009

Last edited |

Written by Maurice M. Ohayon, MD, DSc, PhD
Reference to cite:

  1. Ohayon MM. Epidemiology of insomnia: what we know and what we still need to learn. Sleep Med Rev. 2002 Apr;6(2):97-111.
  2. Ohayon MM. Insomnia Review, Sleep Epidemiology Research Center, Palo Alto, 2001.
  3. Ohayon MM. Insomnia Review, Sleep-Eval Website, 2002

IS INSOMNIA A PROBLEM OF:

  • Frequency?
  • Severity?
  • Chronicity?

WHAT MAY CAUSE INSOMNIA?

  • Mental disorder?
  • Sleep disorder?
  • Medical condition?
  • Age and gender?
  • Life style?

WHAT ARE THE CONSEQUENCES OF INSOMNIA?

  • Health
  • Mental disorders
  • Daytime functioning

WHAT IS INSOMNIA?

The epidemiological approach for measuring insomnia can be summarized by:

  • Dissatisfaction with QUANTITY of sleep
    • Dissatisfaction with quantity of sleep
  • Dissatisfaction with QUALITY of sleep
    • Dissatisfaction with quantity of sleep

CHRONICITY OF INSOMNIA SYMPTOMS

  • About 4% --> 1 month or less
  • About 6% --> between > 1 and < 6 months
  • About 5% --> between >= 6 and <12 months
  • About 85% --> 1 year or more
  • About 68% --> 5 years or more (Based upon data from Ohayon et al, 1996, 1997, 2001, 2002)

WHAT MAY CAUSE INSOMNIA?

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Content of this page is extracted from:
Ohayon MM. Conference, Sleep Epidemiology Center, Palo Alto, 2001.