Pittsburgh Sleep Quality Index (PSQI)

Pittsburgh Sleep Quality Index (PSQI)

Recommended use
Night-time sleep problems.


Population (Age range)
13 years and older

Time to administer
10-15 minutes

Time period covered
1 month

Number of items/version
19 self-rated questions and 5 additional questions for a bed partner or roommate.

PSQI is a self-rated questionnaire that primarily assesses nighttime sleep problems. It focuses on sleep experiences over the past month.

Buysse,D.J., Reynolds,C.F., Monk,T.H. et al. The Pittsburgh Sleep Quality Index (PSQI): A new instrument for psychiatric research and practice. Psychiatry Research. 1989;28(2):193-213.

Scale Availability
Freely available; copyright and use instructions