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February 11, 2026Industrial HealthOpen Access

Longitudinal association of nonrestorative sleep with subjective health and work performance: a cohort study in the Japanese construction industry

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Authors

SMShota MatsunagaMSMitsuhiro SadoYKYoshitaka Kaneita

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Overview

Longitudinal study shows nonrestorative sleep reduces subjective health and work performance in workers, suggesting intervention benefits.

Key Points

  • The study investigates how nonrestorative sleep is related to subjective health and work performance among workers.
  • Conducted a longitudinal cohort study using health data from fiscal years 2018 to 2023.
  • Involved 36,160 workers from the Japanese construction industry.
  • Assessed nonrestorative sleep using a survey question about feeling refreshed after sleep.
  • Analyzed associations with generalized linear models.
  • 55.4% prevalence of nonrestorative sleep among workers.
  • Nonrestorative sleep linked to 1.77 times poorer subjective physical health.
  • Mental health was also negatively impacted, with an odds ratio of 1.66.
  • Workers with nonrestorative sleep showed 3.6% lower work performance.
  • Estimated annual productivity loss was around JPY 160,000 per worker.

Cite This Study

Matsunaga et al. (2026) studied this question.

synapsesocial.com/papers/698c1c11267fb587c655e338https://doi.org/10.2486/indhealth.2025-0204
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