Association of social jetlag with metabolic syndrome among Japanese working population: the Furukawa Nutrition and Health Study

Greater social jetlag is significantly associated with an increased likelihood of having metabolic syndrome, with an odds ratio of 1.92 for ≥2 hours of jetlag compared to <1 hour.

• Social jetlag is defined as the difference in sleep times between weekdays and weekends.
• Among 1164 Japanese employees, higher levels of social jetlag were linked to metabolic syndrome.
• The odds ratio for having metabolic syndrome with ≥2 hours of social jetlag was 1.92.
• Increased social jetlag was also linked to a higher likelihood of having a high waist circumference, with an odds ratio of 2.26 for ≥2 hours.
• The findings suggest a potential connection between social jetlag and metabolic health issues in non-shift workers.

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