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Weekdays’ sleeping condition and its influence on occurrence of general malaise in Japanese children aged 10 to 12 years

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Abstract

The present study aimed to elucidate weekdays’ sleeping condition and its influence on occurrence of general malaise in children. A total of 761 Japanese children aged 10 to 12 years were surveyed regarding their weekdays’ waking time and bedtime and general malaise using a self-administered questionnaire. As the result of hierarchical cluster analysis on the sleep condition, the participants were classified into three clusters. Sleep duration was significantly longer in cluster 1 (9.35 ± 0.52 h) than in clusters 2 (7.83 ± 0.77 h) and 3 (9.02 ± 0.30 h) and significantly longer in cluster 3 than in cluster 2. Waking time was significantly later in cluster 3 (7:01 ± 0:12) than in clusters 1 (6:22 ± 0:31) and 2 (6:24 ± 0:33, p < 0.001). Bedtime was significantly later in cluster 2 (22:34 ± 0:47) than in clusters 3 (21:59 ± 0:19) and 1 (21:01 ± 0:22) and significantly later in cluster 3 than in cluster 1. There were significantly more subjects in cluster 2 than in clusters 1 and 3 who responded “nearly every day” or “occasionally” to the five of seven questionnaires related to general malaise. The current results indicate that in Japanese children aged 10 to 12 years, (1) sleeping condition of weekdays are classified into three clusters with different mean values for each of sleep duration, bedtime, and waking time, and (2) the occurrence of general malaise may be enhanced in individuals whose sleep duration is less than 8 h.

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Data availability

The datasets supporting the conclusions of this article are available from the corresponding author upon reasonable request.

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Acknowledgements

We wish to express our sincere gratitude to everyone who participated in the present study.

Funding

This study is not funded by any organization.

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Authors and Affiliations

  1. Kyoritsu Women’s Junior College, Tokyo, Japan

    Tomoko Nakanishi

  2. Graduate School of Health & Social Work, Kanagawa University of Human Services, Kanagawa, Japan

    Tatsuya Yoshikawa

  3. Kanagawa University of Human Services, Kanagawa, Japan

    Ryoko Higuchi & Shihoko Suzuki

  4. National Institute of Fitness and Sports in Kanoya, Kagoshima, Japan

    Hiroaki Kanehisa

Authors
  1. Tomoko Nakanishi
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  2. Tatsuya Yoshikawa
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  3. Ryoko Higuchi
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  4. Hiroaki Kanehisa
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  5. Shihoko Suzuki
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Corresponding author

Correspondence to Tomoko Nakanishi.

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The authors declare no competing interests.

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The study design was approved by the ethics committee of Kanagawa University of Human Services.

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Informed consent was obtained from all individual participants included in the study.

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Nakanishi, T., Yoshikawa, T., Higuchi, R. et al. Weekdays’ sleeping condition and its influence on occurrence of general malaise in Japanese children aged 10 to 12 years. Sleep Biol. Rhythms 21, 193–199 (2023). https://doi.org/10.1007/s41105-022-00435-z

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  • DOI: https://doi.org/10.1007/s41105-022-00435-z

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