Table 1.

Insomnia Severity Index

Questions	Rating Category
1. Please rate the current (i.e., last 2 weeks) severity of your insomnia problem(s).	None	Mild	Moderate	Severe	Very Severe
Difficulty falling asleep	0	1	2	3	4
Difficulty staying asleep	0	1	2	3	4
Problem waking up too early	0	1	2	3	4
2. How satisfied/dissatisfied are you with your current sleep pattern?	Very Satisfied	Satisfied	Neutral	Dissatisfied	Very Dissatisfied
	0	1	2	3	4
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 Interfering	A Little	Somewhat	Much	Very Much Interfering
	0	1	2	3	4
4. How noticeable to others do you think your sleeping problem is in terms of impairing the quality of your life?	Not At All Noticeable	A Little	Somewhat	Much	Very Much Noticeable
	0	1	2	3	4
5. How worried/distressed are you about your current sleep problem?	Not At All Worried	A Little	Somewhat	Much	Very Much Worried
	0	1	2	3	4

Adapted with permission from Ref. 41.