Shift work, job strain, and metabolic syndrome: Cross-sectional analysis of ELSA-Brasil

Am J Ind Med. 2018 Nov;61(11):911-918. doi: 10.1002/ajim.22910. Epub 2018 Sep 26.


Background: Shift work and psychosocial stressors may contribute to higher metabolic syndrome (MetS) incidence. Few studies investigated whether the presence of both factors simultaneously has a synergic effect on risk of MetS.

Methods: This cross-sectional analysis used baseline data (2008-2010) for 10 960 current workers from ELSA-Brasil. Multiple logistic regression was used to estimate independent associations between shift work and job strain and MetS. An interaction between these factors was tested by including a multiplicative term in the final model.

Results: Exposure to three-shifts a week (that is, three 12 h shifts of work followed by 36 h of rest) and high job-strain were independently associated with greater risk of MetS. We found no indication (P > 0.05) of interaction between working in shifts and job strain on MetS.

Conclusions: Efforts to reduce job strain and shift work should be considered as part of a primary prevention strategy to reduce the risk of MetS.

Keywords: job strain; metabolic syndrome; occupational health; psychosocial factor; shift work.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • Adult
  • Aged
  • Brazil / epidemiology
  • Cross-Sectional Studies
  • Female
  • Humans
  • Incidence
  • Logistic Models
  • Male
  • Metabolic Syndrome / epidemiology*
  • Metabolic Syndrome / psychology
  • Middle Aged
  • Occupational Diseases / epidemiology*
  • Occupational Diseases / psychology
  • Occupational Stress / epidemiology*
  • Occupational Stress / psychology
  • Prevalence
  • Work Schedule Tolerance*

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