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The relationship between social jetlag and subjective sleep quality: differences in young and middle-aged workers

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Abstract

Social jetlag is a recent problem that is associated with a wide range of issues in the context of modern life. However, differences in the effects of social jetlag on sleep quality between young and middle-aged workers remain unclear. Accordingly, we aimed to examine the different effects of social jetlag on sleep quality in young (20–39 years) and middle-aged (40–59 years) workers from one factory. We included 106 male full-time workers (average age: 35.8 ± 11.5 years) who worked at the Kobe Factory of Fuji Electric Co., Ltd. Social jetlag was evaluated using the Munich ChronoType Questionnaire Japanese Version. Subjective sleep quality was assessed using the Pittsburgh Sleep Quality Index Japanese Version. Chronotype was determined using the Morningness–Eveningness Questionnaire Japanese Version (MEQ), while the health-related quality-of-life was evaluated using a revised version of the MOS 36-Item Short-Form Survey. Furthermore, we examined factors related to sleep quality in each age group using multiple regression analysis. Subjective sleep quality in the analysis set was poor; moreover, 39.4% of the participants had social jetlag for ≥ 1 h. Compared with middle-aged workers, young workers showed significantly longer and lower social jetlag and MEQ scores, respectively. Multiple regression analysis revealed that mental health and social jet lag were significantly associated with sleep quality in young participants. Contrastingly, social jetlag was not associated with sleep quality in middle-aged workers. Our findings demonstrate the importance of considering the effects of age-based factors on sleep quality.

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Acknowledgements

We thank all volunteers for participating in this study.

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The authors received no financial support for the research, authorship, and/or publication of this article.

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Authors and Affiliations

  1. School of Health Sciences, Nursing, Kobe Tokiwa University, 2-6-2 Otani-cho, Nagata-ku, Kobe, 653-0838, Japan

    Chieko Tan & Hideyuki Shiotani

  2. Kobe Factory of Fuji Electric Co., Ltd., Kobe, Japan

    Kaori Sato

Authors
  1. Chieko Tan
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  2. Kaori Sato
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  3. Hideyuki Shiotani
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Correspondence to Chieko Tan.

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This study was approved by the Ethics Committee of Kobe University (approved numbers: 2019-833). All participants were informed about the nature of this study and provided written informed consent.

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Tan, C., Sato, K. & Shiotani, H. The relationship between social jetlag and subjective sleep quality: differences in young and middle-aged workers. Sleep Biol. Rhythms 21, 7–12 (2023). https://doi.org/10.1007/s41105-022-00410-8

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