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Social jetlag is associated with an increased likelihood of having depressive symptoms among the Japanese working population: the Furukawa Nutrition and Health Study

STUDY OBJECTIVES: Social jetlag, a mismatch between biological and social timing, has been reported to be associated with depressive symptoms among general population. However, evidence on this association is lacking among non-shift workers, who are under pressure to adapt themselves to a work sched...

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Detalles Bibliográficos
Autores principales: Islam, Zobida, Hu, Huanhuan, Akter, Shamima, Kuwahara, Keisuke, Kochi, Takeshi, Eguchi, Masafumi, Kurotani, Kayo, Nanri, Akiko, Kabe, Isamu, Mizoue, Tetsuya
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2019
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6985924/
https://www.ncbi.nlm.nih.gov/pubmed/31555821
http://dx.doi.org/10.1093/sleep/zsz204
Descripción
Sumario:STUDY OBJECTIVES: Social jetlag, a mismatch between biological and social timing, has been reported to be associated with depressive symptoms among general population. However, evidence on this association is lacking among non-shift workers, who are under pressure to adapt themselves to a work schedule. We investigated the cross-sectional association of social jetlag with depressive symptoms among Japanese non-shift workers. METHODS: This study included 1,404 employees, aged 18–78 years, who completed a study questionnaire at a periodic health checkup. Social jetlag was calculated as the absolute value of the difference in the midpoint of sleep times between weekdays and weekends. Depressive symptoms were assessed using the Center for Epidemiologic Studies Depression Scale. Multivariable logistic regression was used to estimate the odds ratio (OR) with adjustments for potential confounders including diet and chronotype. RESULTS: Of the study participants, 63.5%, 28.4%, and 8.1% had less than 1 hour, 1 to less than 2 hours, and at least 2 hours of social jetlag, respectively. Greater social jetlag was significantly associated with an increased likelihood of having depressive symptoms. The multivariable-adjusted OR (95% confidence interval) were 1.30 (0.95 to 1.78) and 2.14 (1.26–3.62) for 1 to less than 2 hour and at least 2 hours compared to less than 1 hour of social jetlag. The association between social jetlag and depressive symptoms appeared to be linear, according to restricted cubic spline regression. CONCLUSION: Results suggest that greater social jetlag is associated with an increased likelihood of having depressive symptoms among non-shift workers.