SLEEP QUALITY SCALE (SQS)

The following survey investigates your quality of sleep in the last month. For each question, please choose one of 4 possible answers:

• Rarely ( none or 1-3 times a month) = 0
• Sometimes (1-2 times a week) = 1
• Often (3 to 5 times a week) = 2
• Almost always (6 to 7 times a week) = 3

SURVEY:

1. I have difficulty falling asleep
2. I fall into deep sleep
3. I wake up while sleeping
4. I have difficulty getting back to sleep once I wake up in the middle of the night
5. I wake up easily because of noise
6. I toss and turn
7. I never go back to sleep after awakening during sleep
8. I feel refreshed after sleep
9. I feel unlikely to sleep after sleep
10. Poor sleep gives me headaches
11. poor sleep makes me irritated
12. I would like to sleep more after waking up
13. My sleep hours are enough
14. Poor sleep makes me lose my appetite
15. Poor sleep makes it hard for me to think
16. I feel vigorous after sleep
17. Poor sleep makes me lose interest in work and others
18. My fatigue is relieved after sleep
19. Poor sleep causes me to make mistakes at work
20. I am satisfied with my sleep
21. Poor sleep makes me forget things more easily
22. Poor sleep makes it hard to concentrate at work
23. Sleepiness interferes with my daily life
24. Poor sleep makes me lose desire in all things
25. I have difficulty getting out of bed
26. Poor sleep makes me easily tired at work
27. I have a clear head after sleep
28. Poor sleep makes my life painful

SCORING

First: reverse scores on items 2, 8, 9, 13, 16, 18, 20, and 27 as follows:

• Rarely = 3
• Sometimes = 2
• Often = 1
• Almost always = 0

Second: tally up your scores. Total scores can range between 0 and 84, with higher scores indicating more acute sleep problems.

Credits:

Yi, H., Shin, K., & Shin, C. (2006). Development of
the sleep quality scale. Journal of Sleep Research,
15 (3), 309–316