Weight gain over time linked to shift work in Japanese men

Alternating shift work is associated with a 14% higher likelihood of a 5% increase in BMI compared to regular day work.

• Shift workers had increased odds of weight gain, with a 5% increase in BMI linked to an odds ratio of 1.14.
• A 7.5% increase in BMI was also associated with alternating shift work, showing an odds ratio of 1.13.
• The likelihood of a 10% increase in BMI was similarly associated with alternating shift work, with an odds ratio of 1.13.
• Initial BMI at the start of the study was positively correlated with subsequent increases in BMI over the observation period.
• Older age and certain drinking habits were found to be linked to lower odds of weight gain in this population.

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