The Insomnia Severity Index (ISI): Development and clinical applications

Charles M. Morin, PhD

Professor and Canada Research Chair (Sleep Medicine), Université Laval, Québec, Canada

Insomnia is a common health complaint that can occur independently or comorbidly with another medical (pain) or psychiatric (depression) condition. Insomnia affects 10% of the adult population on a chronic basis, plus an additional 15% to 20% occasionally. Persistent insomnia carries significant economic burden. Despite its high prevalence and negative consequences, insomnia often remains undetected and untreated. It is essential to have brief and psychometrically-sound assessment instruments to detect insomnia and evaluate treatment outcome.


What you will learn

  • Insomnia – what is it and how do we measure it?

  • Description of Insomnia Severity Index (ISI), background, scoring guidelines

  • Psychometric data – reliability, validity, sensitivity

  • Scope and clinical utility