Table 1.

Insomnia Severity Index

QuestionsRating Category
1. Please rate the current (i.e., last 2 weeks) severity of your insomnia problem(s).NoneMildModerateSevereVery Severe
    Difficulty falling asleep01234
    Difficulty staying asleep01234
    Problem waking up too early01234
2. How satisfied/dissatisfied are you with your current sleep pattern?Very SatisfiedSatisfiedNeutralDissatisfiedVery Dissatisfied
3. 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, etc.)?Not At All InterferingA LittleSomewhatMuchVery Much Interfering
4. How noticeable to others do you think your sleeping problem is in terms of impairing the quality of your life?Not At All NoticeableA LittleSomewhatMuchVery Much Noticeable
5. How worried/distressed are you about your current sleep problem?Not At All WorriedA LittleSomewhatMuchVery Much Worried
  • Adapted with permission from Ref. 41.