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Insomnia Severity Index

Insomnia symptoms and impact over the last two weeks.

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Distinguishes 'I sleep 6h' (might be optimal) from 'I sleep 6h and it's destroying me' (signal). Critical given stim-stack interaction with sleep architecture.

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1/7 Difficulty falling asleep

None 0 Mild 1 Moderate 2 Severe 3 Very Severe 4

2/7 Difficulty staying asleep

None 0 Mild 1 Moderate 2 Severe 3 Very Severe 4

3/7 Problem waking up too early

None 0 Mild 1 Moderate 2 Severe 3 Very Severe 4

4/7 How satisfied/dissatisfied are you with your CURRENT sleep pattern?

Very Satisfied 0 Satisfied 1 Moderately Satisfied 2 Dissatisfied 3 Very Dissatisfied 4

5/7 To what extent do you consider your sleep problem to INTERFERE with your daily functioning (e.g., daytime fatigue, mood, ability to function at work, concentration, memory)?

Not at all interfering 0 A little 1 Somewhat 2 Much 3 Very much interfering 4

6/7 How NOTICEABLE to others do you think your sleep problem is in terms of impairing the quality of your life?

Not at all noticeable 0 Barely 1 Somewhat 2 Much 3 Very much noticeable 4

7/7 How WORRIED/distressed are you about your current sleep problem?

Not at all worried 0 A little 1 Somewhat 2 Much 3 Very much worried 4

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Citation: Morin CM, Belleville G, Belanger L, Ivers H. The Insomnia Severity Index: psychometric indicators to detect insomnia cases and evaluate treatment response. Sleep. 2011;34(5):601-8.