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Related Experiment Videos

Family studies in insomnia.

Yves Dauvilliers1, Charles Morin, Katerina Cervena

  • 1Service de Neurologie B, Hôpital Gui-de-Chauliac, 80 Avenue Augustin Fliche, Montpellier cedex 5 34295, France. ydauvilliers@yahoo.fr

Journal of Psychosomatic Research
|May 4, 2005
PubMed
Summary
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Insomnia often runs in families, with over 70% of primary insomnia cases showing a familial link. This suggests a significant genetic component for insomnia, especially in early-onset cases.

Area of Science:

  • Sleep Medicine
  • Genetics
  • Psychiatry

Background:

  • A familial component is a hypothesized predisposing factor for insomnia.
  • Few studies have comprehensively investigated the prevalence of insomnia within families.

Purpose of the Study:

  • To evaluate the prevalence of insomnia among first-degree relatives of chronic insomniacs.
  • To compare symptoms between sporadic and familial insomnia.
  • To explore the familial aggregation of insomnia.

Main Methods:

  • 256 chronic insomniacs underwent clinical interviews, psychometric questionnaires, and family history assessments.
  • Polysomnography was used when indicated.
  • A control group estimated the base-rate incidence of insomnia in families.

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Main Results:

  • 72.7% of primary insomnia patients reported familial insomnia versus 24.1% in controls.
  • 43.3% of psychiatric insomnia patients reported familial insomnia.
  • Mothers were the most frequently affected relatives; familial insomnia showed a tendency towards earlier onset.

Conclusions:

  • A significant increase in familial aggregation of insomnia was observed.
  • Findings support further genetic studies, particularly for primary insomnia with early onset.
  • The study highlights the importance of family history in understanding insomnia.