What is the Pittsburgh Sleep Quality Index (PSQI)?
The PSQI is a standardized questionnaire designed to measure sleep quality and identify sleep disorders. It consists of 19 self-rated questions and 5 questions rated by a bed partner or roommate, if available. These questions are grouped into seven components:
Subjective sleep quality Sleep latency Sleep duration Habitual sleep efficiency Sleep disturbances Use of sleeping medication Daytime dysfunction
Each component is scored from 0 (no difficulty) to 3 (severe difficulty), with the global score ranging from 0 to 21. A higher score indicates poorer sleep quality.
