2024 Volume 32 Issue 3 Pages 148-155
Objective: To examine the combined impact of insomnia and skipping breakfast on labor productivity.
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.
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).
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.
