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Cited by 232Sleep and Work-Related FatigueCircadian rhythm and melatoninWorkplace Health and Well-being

Shift work and the risk of diabetes mellitus among Japanese male factory workers.

Open access
Morikawa, Yuko, Nakagawa, Hideaki, Miura, Katsuyuki, Soyama, Yoshiyuki, Ishizaki, Masao, Kido, Teruhiko, Naruse, Yuchi, Suwazono, Yasushi +1 more·2005·Scandinavian Journal of Work, Environment & Health
DOI 10.5271/sjweh.867
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Abstract

OBJECTIVES: This study investigated whether shift work is a risk factor for the development of diabetes mellitus. METHODS: The workers, 2860 men in a sash and zipper factory in the Toyama prefecture of Japan, were followed for 8 years, and the incidence rate of diabetes mellitus was determined. The cohort contained fixed daytime blue-collar workers, shift blue-collar workers, and white-collar workers. The workers were considered to have diabetes mellitus if, in their annual health examination, they had a glycated hemoglobin level of > or = 6.1 or if the diagnosis had been made by a hospital physician. The relative risks were estimated by Cox's proportional hazards regression model. RESULTS: Among the 2860 workers, there were 87 cases of new-onset diabetes mellitus, resulting in an incidence rate of 4.41 per 1000 person-years. The age-adjusted incidence was highest for the two-shift workers and lowest for the white-collar workers. The relative risk of diabetes mellitus for the two-shift workers and the three-shift workers compared with the fixed daytime workers was 1.73 and 1.33, respectively, after adjustment for all the confounding factors, but these values were not statistically significant. When the white-collar workers were used as a reference group, a significantly increased risk of diabetes mellitus was found for the two-shift workers (relative risk was 2.01 after adjustment for all confounding factors), but not for the three-shift workers or the fixed daytime blue-collar workers. CONCLUSIONS: The study suggests that shift work is a risk factor for the onset of diabetes mellitus and that there is a different risk associated with different shift schedules.

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  • 2-shift and 3-shift workers have increased relative risk for type 2 diabetes compared to daytime workers.

    “In a study conducted in 2,860 male workers, the relative risk for T2D for the 2-shift workers and 3-shift workers compared to daytime workers was increased [20].”

    From Metabolic effects of sleep disruption, links to obesity and diabetes (2014) · cites this paper as [20]

  • Shift work is a risk factor for metabolic disorders such as diabetes and obesity.

    “Numerous epidemiological studies have demonstrated that shift work is a risk factor for metabolic disorders such as diabetes and obesity (Morikawa et al., 2005; Niedhammer et al., 1996; Suwazono et al., 2006, 2008a).”

    From The impact of the circadian timing system on cardiovascular and metabolic function (2012) · cites this paper as Morikawa et al., 2005

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Research works printed but not linked: 5

  1. Bøggild H, Knutsson A. Shift work, risk factors and cardio- vascular disease [review]. Scand J Work Environ Health 1999;25(2):85-99.
  2. Theorell T, Åkerstedt T. Day and night work: changes in cholesterol, uric acid, glucose and potassium in serum and in circadian patterns. Acta Med Scand 1976;200:47-53.
  3. Van Cauter E, Desir D, Decoster C, Fery F, Balosse EO. Nocturnal disease of glucose tolerance during constant glu- cose infusion. J Clin Endocrinol Metab 1989;69:604-11.
  4. Morikawa Y, Nakagawa H, Ishizaki M, Tabata M, Nishijo M, Miura K, et al. Ten-year follow-up study on the relation between the development of non-insulin-dependent diabetes mellitus and occupation. Am J Ind Med 1997;31:80-4.
  5. Kawakami N, Takatsuka N, Shimizu H, Ishibashi H. Effects of smoking on the incidence of non-insulin dependent diabe- tes mellitus. Am J Epidemiol 1997;145:103-9.

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Authors
Morikawa, Y., Nakagawa, H., Miura, K., Soyama, Y., Ishizaki, M., Kido, T., Naruse, Y., Suwazono, Y., & Nogawa, K.
Affiliations
  • Kanazawa Medical University (JP)
  • Kanazawa University (JP)
  • Chiba University (JP)
ORCID
Venue
Scandinavian Journal of Work, Environment & Health
Publisher
Scandinavian Journal of Work, Environment and Health
Published
2005-06
Volume
31
Issue
3
Pages
179-183
ISSN
  • 0355-3140 (ISSN-L)
  • 1795-990X
DOI
10.5271/sjweh.867
OpenAlex
W2083449354
Cited by
232
References
28
Citations by year
2026: 3 · 2025: 3 · 2024: 4 · 2023: 8 · 2022: 8 · 2021: 10 · 2020: 14 · 2019: 9 · 2018: 10 · 2017: 18 · 2016: 17 · 2015: 18 · 2014: 24 · 2013: 12 · 2012: 22
FWCI
6.03
Type
journal article
Language
en
Open access
Licence
cc-by
Locations
  • Scandinavian Journal of Work Environment & Health (publishedVersion, cc-by)
  • PubMed (publishedVersion)
Topics
  • Social Sciences › Psychology › Experimental and Cognitive Psychology › Sleep and Work-Related Fatigue
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Circadian rhythm and melatonin
  • Health Sciences › Health Professions › General Health Professions › Workplace Health and Well-being
Keywords
shift work, diabetes mellitus, occupational health, industrial workers, shift schedules, blue-collar workers, white-collar workers, HbA1c, diabetes incidence, risk factors
MeSH terms
Adult, Diabetes Mellitus, Humans, Japan, Male, Middle Aged, Occupational Diseases, Risk Factors, Work Schedule Tolerance, Proportional Hazards Models

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