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2.2.4. Pittsburgh Sleep Quality Index Questionnaire
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We used the Chinese version of the Pittsburgh Sleep Quality Index Questionnaire (PSQI), as translated by Zou et al. (2023). The scale comprises seven items, each scored from 0 to 3 points, meaning the total score ranges from 0 to 21. Regarding the total PSQI score, ≤ 5 indicates good sleep quality, 6–10 means average sleep quality, 11–15 represents poor sleep quality, and 16–21 suggests very poor sleep quality. In international tests, the PSQI has demonstrated good reliability and validity. Cronbach's α coefficient of the scale in this study was 0.84.
Copyright and License information: ©2023 Chen, Chen, Jin and Lu.
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