Association of Subjective Quality and Quantity of Sleep with Quality of Life among a General Population

Kentaro Matsui, Takuya Yoshiike, Kentaro Nagao, Tomohiro Utsumi, Ayumi Tsuru, Rei Otsuki, Naoko Ayabe, Megumi Hazumi, Masahiro Suzuki, Kaori Saitoh, Sayaka Aritake-Okada, Yuichi Inoue and Kenichi Kuriyama
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Kentaro Matsui: Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo 1878551, Japan
Takuya Yoshiike: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan
Kentaro Nagao: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan
Tomohiro Utsumi: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan
Ayumi Tsuru: Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo 1878551, Japan
Rei Otsuki: Department of Laboratory Medicine, National Center Hospital, National Center of Neurology and Psychiatry, Tokyo 1878551, Japan
Naoko Ayabe: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan
Megumi Hazumi: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan
Masahiro Suzuki: Department of Psychiatry, Nihon University School of Medicine, Tokyo 1738610, Japan
Kaori Saitoh: Department of Psychiatry, Nihon University School of Medicine, Tokyo 1738610, Japan
Sayaka Aritake-Okada: Department of Health Sciences, Saitama Prefectural University, Saitama 3438540, Japan
Yuichi Inoue: Japan Somnology Center, Neuropsychiatric Research Institute, Tokyo 1510053, Japan
Kenichi Kuriyama: Department of Sleep-Wake Disorders, National Institute of Mental Health, National Center of Neurology and Psychiatry, Tokyo 1878553, Japan

IJERPH, 2021, vol. 18, issue 23, 1-11

Abstract: This study aimed to determine whether both subjective sleep quality and sleep duration are directly associated with quality of life (QOL), as well as indirectly associated with QOL through insomnia symptoms. Individuals aged 20–69 years without mental illness ( n = 9305) were enrolled in this web-based cross-sectional survey. The Short Form-8 was used to assess physical and mental QOL. We used the Pittsburgh Sleep Quality Index (PSQI) and extracted items related to subjective sleep quality and sleep duration. Insomnia symptoms were also extracted from the PSQI. The hypothesized models were tested using structural equation modeling. Worse sleep quality, but not shorter sleep duration, was related to worse physical QOL. Both worse sleep quality and shorter sleep duration were related to worse mental QOL. Insomnia symptoms mediated these relationships. Subgroup analyses revealed a U-shaped relationship between sleep duration and physical/mental QOL. However, the relationship between sleep quality and physical/mental QOL was consistent regardless of sleep duration. The results suggest that subjective sleep quality has a more coherent association with QOL than subjective sleep duration. Because of its high feasibility, a questionnaire on overall sleep quality could be a useful indicator in future epidemiological studies of strategies for improving QOL.

Keywords: sleep quality; sleep duration; insomnia; quality of life (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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