Time frame: Assessment Time Points: Baseline (pre-intervention) Post-intervention (8 weeks) Follow-up (16 weeks)
The Pittsburgh Sleep Quality Index (PSQI) is a validated, self-reported questionnaire used to assess sleep quality and disturbances over the past month. It is widely used in clinical and research settings, including studies on chronic pain and musculoskeletal disorders.
Structure:
The PSQI consists of 19 individual items combined into 7 components:
Subjective sleep quality - the individual's perception of their sleep
Sleep latency - time taken to fall asleep
Sleep duration - total hours of sleep per night
Habitual sleep efficiency - percentage of time in bed actually spent sleeping
Sleep disturbances - factors causing sleep interruptions (e.g., waking up, pain, environmental disturbances)
Use of sleep medication - frequency of taking sleep aids
Daytime dysfunction - difficulty staying awake or maintaining function during the day
Scoring:
Each component is scored from 0 (no difficulty) to 3 (severe difficulty).
The component scores are summed to generate a global PSQI score