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Insomnia screening against the diagnostic criteria

A 9-question insomnia screen following the ICSD-3-TR diagnostic criteria: night-time symptoms, daytime consequences, frequency, duration. Immediate result, free.

Updated 2026-11-03

Insomnia screening against the diagnostic criteria

Key points

  • Insomnia is diagnosed by FOUR things at once, not by "sleeping little": night-time symptoms, daytime consequences, enough frequency, and enough duration.
  • The line between acute and chronic is 3 months, at a frequency of at least 3 nights a week.
  • Sleeping little while remaining alert and untroubled during the day is NOT insomnia disorder. Some people are naturally short sleepers.
  • This questionnaire screens, it does not diagnose. A diagnosis needs a full history to rule out sleep apnoea, restless legs syndrome, circadian rhythm disorders and other conditions.
  • The result here is assessed by RULE rather than by a total score: night-time symptoms and daytime consequences must both be present, with enough frequency and enough duration, and the case where you simply do not have adequate opportunity to sleep has to be excluded.
  1. Do you have trouble falling asleep (lying down and taking more than 30 minutes to fall asleep)?
  2. Do you wake during the night and struggle to get back to sleep?
  3. Do you wake earlier than intended and find you cannot get back to sleep?
  4. During the day, are you tired, sluggish or low on energy because of your night's sleep?
  5. During the day, do you have trouble concentrating, become forgetful, or perform less well at work or study?
  6. Are you irritable, unsettled in mood, or worried about your sleep itself?
  7. How long has this been going on?
  8. In an average week, on how many nights do you have the problem?
  9. DO you have adequate conditions and time to sleep (enough hours available to lie down, a quiet place, not kept awake by work or a small child)?

9 questions still unanswered.

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About the copyright of this questionnaire

This questionnaire was written by the clinic, restating the diagnostic criteria for insomnia disorder in ICSD-3-TR (International Classification of Sleep Disorders, 3rd edition, Text Revision) and DSM-5-TR. It is NOT the ISI (Insomnia Severity Index). That scale is copyrighted and currently has no validated Vietnamese version.

References

  1. International Classification of Sleep Disorders, 3rd edition, Text Revision (ICSD-3-TR). Darien, IL - American Academy of Sleep Medicine, 2023
  2. Diagnostic and Statistical Manual of Mental Disorders, Fifth Edition, Text Revision (DSM-5-TR) - American Psychiatric Association, 2022
  3. Behavioral and psychological treatments for chronic insomnia disorder in adults: an AASM clinical practice guideline - American Academy of Sleep Medicine, 2021 · DOI 10.5664/jcsm.8986

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