Effect of Shift Work on the Development of Metabolic Syndrome After 3 Years in Japanese Male Workers

The odds ratio for developing metabolic syndrome from 2-shift work is 1.43 compared to daytime work.

• A cohort of 1,677 Japanese male employees aged 36 to 57 was followed for 3 years.
• 2-shift work is associated with a higher risk of developing metabolic syndrome compared to daytime work.
• The odds ratio for 2-shift work indicates a significant increase in risk at 1.43 using standard criteria.
• When applying Japanese criteria for metabolic syndrome, the odds ratio for 2-shift work rises to 1.88.
• 3-shift work does not show a significant association with metabolic syndrome risk compared to daytime work.

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