Insomnia Severity Index Test (ISI)
For each question below, please circle the number corresponding most accurately to your sleep patterns in the LAST 2 WEEKS.
1. Difficulty falling asleep:
Score: 0
2. Difficulty staying asleep:
Score: 0
3. Problem waking up too early in the morning:
Score: 0
4. How SATISFIED/dissatisfied are you with your current sleep pattern?
Score: 0
5. To what extent do you consider your sleep problem to INTERFERE with your daily functioning (e.g. daytime fatigue, ability to function at work/daily chores, concentration, memory, mood)?*
Score: 0
6. How NOTICEABLE to others do you think your sleeping problem is in terms of impairing the quality of your life?
Score: 0
7. How WORRIED/distressed are you about your current sleep problem?
Score: 0
Your ISI Result
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IMPORTANT: This screening is not a diagnosis. If these feelings are affecting your daily life, consider speaking with a mental health professional for support and guidance.
In cases of crisis (if you are in a life-threatening situation or someone may be in danger), please call Befrienders at 03-7627 2929 or dial 999 for immediate help. You may also seek assistance directly from the nearest hospital emergency room. Help is available, and you are not alone.
10
Moderate Severe
✅ Insomnia Severity Index (ISI)
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Validation: Confirmed through multiple studies including clinical interviews and ROC analysis; optimal cutoff score of 14 yielded 82.4% sensitivity and 82.1% specificity for detecting clinical insomnia
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Recommendation: Widely used in primary care, mental health, and sleep clinics to assess insomnia severity and monitor treatment progress
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Reliability: Meta-analysis across 33 studies reported Cronbach’s α ≈ 0.83, indicating good internal consistency
Total score categories:
Scores Interpretation
0 - 7 No clinically significant insomnia
8 - 14 Subthreshold insomnia
15 - 21 Clinical insomnia (moderate severity)
22 - 28 Clinical insomnia (severe)
Higher scores indicate more acute symptoms of insomnia.