Pittsburgh Sleep Quality Index
PSQISleep Quality
19 items
1989
α 0.70–0.83
Free
Buysse, D.J., Reynolds, C.F., Monk, T.H., Berman, S.R., & Kupfer, D.J.
What it measures
The most widely used self-report measure of sleep quality in clinical research. Covers seven components of sleep over the past month. A global PSQI score >5 differentiates poor from good sleepers with good sensitivity and specificity.
Representative items
- During the past month, when have you usually gone to bed at night?
- During the past month, how long (in minutes) has it usually taken you to fall asleep each night?
- During the past month, how often have you had trouble sleeping because you cannot get to sleep within 30 minutes?
- During the past month, how often have you had trouble sleeping because you wake up in the middle of the night or early morning?
- During the past month, how would you rate your sleep quality overall?
Citation
Buysse, D.J., Reynolds, C.F., Monk, T.H., Berman, S.R., & Kupfer, D.J. (1989). The Pittsburgh Sleep Quality Index: A new instrument for psychiatric practice and research. Psychiatry Research, 28(2), 193–213.