Insomnia Severity Index (ISI)
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
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Calculation
How severe is your difficulty falling asleep?
Consider your sleep over the last 2 weeks.
The result updates as you change the fields. Your data never leaves the browser.
Only upon clicking, current data is sent to generate the PDF and is not stored.
How it is calculated
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
Formula
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
Limits of the method
Informational translation for self-assessment. Validation of this particular adaptation has not been confirmed. A score does not establish a diagnosis, and a low score does not rule out illness.
Sources of the method
- Morin CM et al. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response. Sleep, 2011
- Bastien CH et al. Validation of the Insomnia Severity Index as an outcome measure for insomnia research. Sleep Med, 2001
- PhenX Toolkit. Insomnia Severity Index: patient questionnaire, last two weeks, protocol 640801
This calculation is for reference only and is not medical advice, a diagnosis or a prescription. If you have a medical condition, are pregnant, take medication or have any doubts, discuss the result with a physician or a qualified nutrition professional.
How to use the calculation
Enter the starting values
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
Adjust the parameters
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
Read the result
Informational translation for self-assessment. Validation of this particular adaptation has not been confirmed. A score does not establish a diagnosis, and a low score does not rule out illness.
Frequently asked questions
What does the calculation show?
Sleep assessment over the last 2 weeks: 7 items with distinct 0–4 scales; total 0–28. Satisfaction, noticeability, worry and impact on daily life have their own responses.
What limitations apply?
Informational translation for self-assessment. Validation of this particular adaptation has not been confirmed. A score does not establish a diagnosis, and a low score does not rule out illness.
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What next
Formula breakdowns, biomarker reference ranges and nutrition articles with cited sources are in the NutriFit knowledge base.
Go to the knowledge base