Pittsburg Sleep Quality Index
What It Measures
The PSQI asks how a person has been sleeping over the past month, and covers more ground than a single question about sleep quality would. It asks what time they go to bed, how long it takes to fall asleep, how long they actually sleep, how often specific problems wake them, whether they take anything to sleep, and how much all of it affects the day that follows.
Nineteen self-rated items feed seven component scores: subjective sleep quality, sleep latency, sleep duration, habitual sleep efficiency, sleep disturbances, use of sleeping medication, and daytime dysfunction. Each component scores 0 to 3, and the seven sum to a global score from 0 to 21. Higher means worse sleep.
Further Reading
Additional Notes
Licensing Notes: The instrument and scoring materials are posted by the University of Pittsburgh's Sleep Medicine Institute. Confirm terms before commercial reproduction.
Learn More: A global score above 5 distinguishes poor from good sleepers, with 89.6% sensitivity and 86.5% specificity in the original validation
