Insomnia Severity Index
The Insomnia Severity Index is a brief self-report of insomnia severity. This page is for clinics. It is not a diagnosis of insomnia disorder and not a public test.
Overview
What is the ISI?
The ISI asks about insomnia complaints and associated distress. Clinics use it as a compact insomnia screen. It does not prescribe CBT-I, medication, or any other treatment.
Development and clinical use
Charles Morin developed the ISI as a brief insomnia-severity instrument, and Bastien, Vallières and Morin published its validation in 2001. It is widely used in sleep clinics and research.
- Mode
- Patient self-report
- Focus
- Insomnia severity
- Typical use
- Sleep-clinic intake
- Not a treatment plan
- No therapy prescribed
- Clinical role
- Insomnia context
- Diagnosis
- Not established by score
Administration
A focused client experience
Respondents rate the current (last two weeks) severity of three insomnia problems, then their satisfaction with sleep, interference with daily functioning, how noticeable the problem is to others, and how worried they are about it. Each item is rated from 0 to 4.
- One question at a time with visible progress
- Large keyboard-operable response choices
- Previous, next, and answer-review steps
- Clear confirmation that results go to the clinic
The illustration shows layout only. It does not reproduce ISI item wording.
Report showcase
Designed to make evidence easy to review
The downloadable synthetic example illustrates report layout using invented response patterns, without patient data or instrument questions.
- Named instrument, version, and provenance
- Item-level response pattern without source wording
- Methodology, references, and clinical boundary
- Responsible clinician review rather than automated conclusions
Clinician review required
Methodology
Understand the measure and its scoring conventions
Published scoring guidelines add the seven items for a total from 0 to 28, with bands from no clinically significant insomnia (0-7) through subthreshold insomnia (8-14) and clinical insomnia of moderate severity (15-21) to clinical insomnia, severe (22-28). This public page does not independently verify scoring, cutoffs, or a production scoring rule.
References
- Original ISI paperBastien CH, Vallieres A, Morin CM. Validation of the Insomnia Severity Index. Sleep Medicine. 2001;2(4):297-307.
Questions
What clinics ask before they evaluate the ISI
These answers stay inside educational catalogue scope. They do not replace official manuals or clinician judgement.
Does ISI diagnose insomnia disorder?
No. It is a severity self-report. Diagnosis remains a clinician task using history and published diagnostic criteria.
Can I complete ISI here?
No. This page does not administer the measure or recommend treatment.
How is ISI used on Lirena?
As a sleep-intake self-report. Clinicians review the result with sleep history rather than treating a score as a diagnosis.
Is ISI the same as SCI or AIS?
They are related insomnia-oriented instruments with different item sets. Name the exact form your clinic intends to use.