2.5 Assessment of sleep quality
The Pittsburgh Sleep Quality Index (PSQI) is an effective indicator of
sleep quality and patterns. Subjective sleep quality, sleep latency,
sleep length, habitual sleep efficiency, sleep disruptions, use of sleep
medications, and daytime dysfunction were evaluated. Each factor was
weighted from 0 to 3, resulting in a global score between 0 and 21. Poor
sleep quality was defined as a global PSQI score of
>517.