Insomnia Severity Index (ISI)

Validated insomnia screening questionnaire

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Clinical Assessment Tool

The Insomnia Severity Index is a validated screening tool for insomnia symptoms. Results should be interpreted by qualified healthcare professionals. This tool does not provide medical diagnosis and should not replace professional sleep evaluation.

Insomnia Severity Index

For each question, please select the answer that best describes your sleep over the last 2 weeks:

Difficulty falling asleep (over the last 2 weeks)

Difficulty staying asleep (over the last 2 weeks)

Problems waking up too early (over the last 2 weeks)

How satisfied or dissatisfied are you with your current sleep pattern?

How noticeable to others do you think your sleep problem is in terms of impairing the quality of your life?

How worried or distressed are you about your current sleep problem?

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 or daily chores, concentration, memory)?

About the Insomnia Severity Index

Validated Tool

  • • Clinically validated insomnia screening questionnaire
  • • Assesses sleep over the last 2 weeks
  • • Widely used in research and clinical practice

Next Steps

  • • Professional review of significant scores
  • • Sleep hygiene and behavioural strategies
  • • Treatment planning if indicated