The relationship between insomnia, skipping breakfast, and labor productivity among Japanese workers

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  • MASUOKA Risa
    Graduate School of Humanities and Sciences, Ochanomizu University
  • SATO Sayaka
    Graduate School of Humanities and Sciences, Ochanomizu University Faculty of Health and Welfare, Takasaki University of Health and Welfare
  • AKAMATSU Rie
    Natural Science Division, Faculty of Core Research, Ochanomizu University
  • IZAWA Shuhei
    National Institute of Occupational Safety and Health, Japan Organization of Occupational Health and Safety
  • NAKAMURA-TAIRA Nanako
    Department of Psychology, Faculty of Letters, Chuo University
  • YOSHIKAWA Toru
    National Institute of Occupational Safety and Health, Japan Organization of Occupational Health and Safety
  • IKEDA Hiroki
    National Institute of Occupational Safety and Health, Japan Organization of Occupational Health and Safety
  • KUBO Tomohide
    National Institute of Occupational Safety and Health, Japan Organization of Occupational Health and Safety

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Other Title
  • 労働生産性に対する不眠と朝食欠食の関連
  • ロウドウ セイサンセイ ニ タイスル フミン ト チョウショク ケッショク ノ カンレン

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<p>Objective: To examine the combined impact of insomnia and skipping breakfast on labor productivity.</p><p>Methods: Cross-sectional data were collected from the “WELWEL” study, which surveyed 20,000 Japanese workers in February 2022. The participants were categorized into two groups: those who had insomnia, and others. They were also divided into two groups: those who skipped breakfast, and others. The relationships between insomnia, skipping breakfast, and labor productivity were examined using Pearson’s chi-square test, two-way ANOVA, and two-way ANCOVA.</p><p>Results: Among the participants, 5,883 (37.4%) exhibited insomnia and 5,260 (33.4%) skipped breakfast. Individuals with both insomnia and breakfast-skipping habits were more likely to be young, living alone, and working more than 50 hours per week. The two-way ANCOVA revealed the main effects of insomnia and skipping breakfast, as well as an interaction effect (insomnia: F=964.43, skipping breakfast: F=24.39, each P<0.001, interaction: F=4.94, P=0.026).</p><p>Conclusion: Those who had insomnia and skipped breakfast had the lowest labor productivity. Therefore, it is necessary to improve work environments in order to support better sleep and regular breakfast intake.</p>

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