Introduction
The Insomnia Severity Index (ISI) is a brief, effective self-report questionnaire used to assess the severity of insomnia. The scale consists of 7 items that can quickly evaluate the impact of insomnia on an individual's daily functioning, and is widely used in clinical and research settings for insomnia assessment.
Test Instructions
Please rate your sleep situation over the past two weeks by selecting the option that best describes your actual situation. Each question has different scoring criteria.
Scoring Method
- Total Score: Sum of all 7 items, range 0-28 points
- Severity: 0-7 = no clinically significant insomnia, 8-14 = subthreshold insomnia, 15-21 = moderate insomnia, 22-28 = severe insomnia
- Clinical significance: Total score ≥8 suggests insomnia problems, ≥15 recommends seeking professional help
Dimension Explanation
- Sleep Onset Difficulty：Prolonged time needed to fall asleep after going to bed
- Sleep Maintenance Difficulty：Frequent awakenings and difficulty returning to sleep
- Early Morning Awakening：Waking earlier than desired and unable to return to sleep
- Sleep Satisfaction：Overall satisfaction with current sleep pattern
- Daytime Functioning：Impact of insomnia on daytime quality of life and functioning
- Others' Observation：Degree to which others notice your sleep problems
- Worry Level：Level of worry and distress about current sleep problems
Notes
- This scale is suitable for assessing insomnia problems in adults
- If total score ≥15, consultation with a sleep specialist is recommended
- This scale is for screening purposes only and cannot replace professional diagnosis