# Validation of the Insomnia Severity Index as an outcome measure for insomnia research

Bastien CH, Vallières A, Morin CM · Sleep Medicine 2(4):297–307 · 2001



## Key finding

The 7-item ISI; ≥15 indicates clinical insomnia.



[Read the paper](https://pubmed.ncbi.nlm.nih.gov/?term=Validation+of+the+Insomnia+Severity+Index+as+an+outcome+measure+for+insomnia+research)

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Educational summary of published research, not medical advice. Screening scores are not diagnoses. If a score is elevated or you feel unwell, talk to a clinician.

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