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Favorable sleep health is positively associated with employee engagement in Japanese companies

In a cross-sectional analysis of 2,502 Japanese companies, favorable sleep health (as part of health-appropriate lifestyle factors) was positively associated with employee engagement (adjusted odds ratio [aOR] 1.03, 95% CI 1.02-1.04). High engagement was strongly linked to higher revenue (aOR 1.65, 95% CI 1.31-2.07) and operating profit (aOR 1.40, 95% CI 1.13-1.74).

Last updated: Aug 6, 2026•0 RCTs•📖 Read as article →

Evidence Score

Evidence Score34/100
Human RCT☆☆☆☆☆
Meta-analysis☆☆☆☆☆
Mechanism★★★★★
Safety★★★★☆
Confidencelow

Study Evidence

Study 1. The association of corporate measures and health management initiatives with employee engagement in Japanese companies.

observational

Ohashi M, Kanegae H, Kitaoka K, Okada K, Fujimoto A, Takase K, Miyazaki T, Yano Y · Journal of occupational and environmental medicine (2026)

Participants: N/A
Duration: Not specified (cross-sectional survey)
Intervention: Observational assessment of corporate health management initiatives, including sleep health as a health-appropriate lifestyle factor
Outcome: Employee engagement (as measured by the Health and Productivity Management Survey), revenue, operating profit
Effect Size: aOR = 1.03 (95% CI 1.02-1.04) for sleep health on engagement; aOR = 1.65 (95% CI 1.31-2.07) for high engagement on revenue
Population: 2,502 Japanese companies participating in Japan's Health and Productivity Management Survey

Result:

PubMed: 42546292DOI: 10.1097/JOM.0000000000003834

Mechanism Graph

Favorable sleep health improves employee physical and mental well-being
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Improved well-being enhances work engagement and productivity
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Higher engagement leads to better corporate financial performance (revenue, operating profit)
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Result: Positive association between sleep health, engagement, and financial outcomes

Limitations

  • ⚠Cross-sectional design prevents causal inference
  • ⚠Sleep health was self-reported and aggregated at company level, not individual-level sleep measures
  • ⚠Potential confounding by other health behaviors and corporate policies not fully adjusted

Frequently Asked Questions

What is the relationship between sleep and employee engagement?▼

The study found that favorable sleep health is positively associated with employee engagement (aOR 1.03, 95% CI 1.02-1.04), meaning companies with better sleep health among employees tend to have higher engagement.

How strong is the effect of sleep on engagement compared to other factors?▼

The effect size for sleep (aOR 1.03) is modest but statistically significant, similar to exercise (aOR 1.02) and BMI (aOR 1.02). Communication tools (aOR 1.32) and hourly paid leave (aOR 1.29) had larger associations.

Does this study prove that improving sleep will increase company revenue?▼

No, this is an observational study, so it cannot prove causation. It shows an association between sleep health, engagement, and financial outcomes, but other factors may be involved.

What are the practical implications for employers?▼

Employers might consider promoting sleep health as part of health management initiatives, alongside other factors like exercise and communication tools, to potentially improve employee engagement and business performance.

Products

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References

  1. 1.Ohashi M, Kanegae H, Kitaoka K, Okada K, Fujimoto A, Takase K, Miyazaki T, Yano Y. "The association of corporate measures and health management initiatives with employee engagement in Japanese companies.." Journal of occupational and environmental medicine, 2026. PMID: 42546292 DOI: 10.1097/JOM.0000000000003834
Disclaimer: This content is for educational purposes only and is not medical advice. Evidence scores reflect the quality and quantity of available research, not clinical recommendations. Always consult a healthcare professional before starting any supplement or intervention.