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Pittsburgh sleep quality index questionnaire

SL Seung-Taek Lim
DK Do-Yoon Kim
HK Hyeong-Tae Kwon
EL Eunjae Lee
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The Pittsburgh Sleep Quality Index (PSQI) is a self-report questionnaire that evaluates sleep quality and quantity. The PSQI self-report questionnaire comprises of 19 items, yielding 7 component scores: (1) subjective sleep quality, (2) sleep latency, (3) duration, (4) habitual sleep efficiency, (5) sleep disturbances, (6) use of sleeping medication, and (7) daytime dysfunction. Each component is grade on a 0–3 severity scale based on the frequency of each disturbance and yields a global score with a range of 0–21 [22]. A PSQI global score of 5 or greater indicates a clinically significant sleep disorder who further screening is needed. Moreover, PSQI alone does not provide a reliable diagnosis [23].

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