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Tools / Quiz · ISI, Bastien et al., 2001

How bad is your sleep,
on the scale sleep clinics use?

The Insomnia Severity Index is the standard brief measure of insomnia in research and clinical practice. It covers the past two weeks. Peptides marketed for sleep are a long way down the list of things that fix insomnia; this tells you whether you have a problem worth treating properly first.

1. Difficulty falling asleep (past two weeks)
2. Difficulty staying asleep
3. Problem waking up too early
4. How satisfied or dissatisfied are you with your current sleep pattern?
5. How noticeable to others do you think your sleep problem is in terms of impairing your quality of life?
6. How worried or distressed are you about your current sleep problem?
7. To what extent does your sleep problem interfere with daily functioning (fatigue, mood, concentration, work)?

INSOMNIA SEVERITY INDEX

—answer all seven
A severity band, not a diagnosis. CBT-I is first-line for chronic insomnia; here is what the peptide evidence actually says ↗

How it’s scored

Total = sum of seven items, 0–28 0–7 no clinically significant insomnia 8–14 subthreshold insomnia 15–21 moderate clinical insomnia 22–28 severe clinical insomnia Bastien, Vallières & Morin, 2001

Assumptions and limits

  • A score reflects the past two weeks only. Insomnia is defined clinically by persistence over three months or more.
  • First-line treatment for chronic insomnia is cognitive behavioural therapy for insomnia (CBT-I), not medication and not peptides.
  • Sleep apnoea produces high scores here and is a different condition; loud snoring or witnessed pauses need a sleep study.
Read this first This tool does arithmetic on numbers you enter, or scores answers you give. It is not a diagnosis, a prescription or a treatment recommendation. Take the result to a licensed clinician.

The instrument behind this quiz

  1. Morin CM, Belleville G, Bélanger L, et al.. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response.Sleep 2011.PubMed 21532953 · doi:10.1093/sleep/34.5.601
  2. Bastien CH, Vallières A, Morin CM. Validation of the Insomnia Severity Index as an outcome measure for insomnia research.Sleep Med 2001.PubMed 11438246 · doi:10.1016/s1389-9457(00)00065-4
  3. Clemente V, Ruivo Marques D, Miller-Mendes M, et al.. The European Portuguese version of the insomnia severity index.J Sleep Res 2021.PubMed 32997368 · doi:10.1111/jsr.13198
  4. Denis I, Turcotte S, Morin CM, et al.. A preliminary validation of the pediatric adaptation of the Insomnia Severity Index.Encephale 2023.PubMed 36244838 · doi:10.1016/j.encep.2022.05.008
  5. Cho YW, Song ML, Morin CM. Validation of a Korean version of the insomnia severity index.J Clin Neurol 2014.PubMed 25045373 · doi:10.3988/jcn.2014.10.3.210
  6. Gagnon C, Bélanger L, Ivers H, et al.. Validation of the Insomnia Severity Index in primary care.J Am Board Fam Med 2013.PubMed 24204066 · doi:10.3122/jabfm.2013.06.130064

Literature retrieved from PubMed on October 18, 2026, favouring human studies and reviews. Numbered markers in the text show which paper supports which statement; uncited entries are background reading.

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