Abstract
Objectives
To investigate whether the association between SJLsc (sleep-corrected social jetlag) and depressive mood is significant and independent of sleep debt.
Methods
Participants from the general adult population were interviewed using structured questionnaires on sleep duration, weekday/weekend sleep schedules, and depressive mood (Patient Health Questionnaire-9). Social jetlag (SJL) was measured by SJLsc and standard SJL (SJLs). SJLs was the absolute difference between mid-sleep time on free days (MSF) and workdays (MSW). For SJLsc, both MSF and MSW were adjusted for average sleep duration across the week according to the direction of sleep debt. Sleep debt was defined by sleep extension on free days. The association of SJL with depression was investigated, and covariates included age, sex, sociodemographic factors, insomnia symptoms, sleep duration, and sleep debt.
Results
A total of 1982 individuals (1089 men; age 43.1 ± 14.4 years) were analyzed. SJL was present in 24.6% measured by SJLsc and 51.0% by SJLs. SJLsc and SJLs were significantly associated with depressive mood (r = 0.06, P = 0.02; r = 0.06, P = 0.01, respectively), independent of sleep debt. Sleep debt was also associated with depression (r = 0.07, P < 0.01).
Conclusions
By adopting sleep-corrected formula for SJL, this study found that misaligned and insufficient sleep, at levels occurring in routine social life, can negatively affect mood. Minimizing social jetlag and sleep deprivation may promote individual psychological well-being.
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Data availability
The datasets generated during the current study are available from the corresponding author upon reasonable request.
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Funding
This study was supported by grants from the Korean Neurological Association (KNA-10-MI-03), Republic of Korea.
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Study design: C-H Yun. Data acquisition: MK Chu, KI Yang, WJ Kim, Hwang, and Dana Oh. Statistical analysis: H-J Im. Manuscript preparation and editing: H-J Im and C-H Yun. Manuscript revision/review: MK Chu, KI Yang, WJ Kim, RJ Thomas, JE Yoon, and C-H Yun. The corresponding author attests that all listed authors meet authorship criteria and that no other meeting authorship criteria have been omitted.
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This study was performed in accordance with the Declaration of Helsinki. The study protocol was approved by the Institutional Review Board of Seoul National University Bundang Hospital (approval no: B-1602-334-008).
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Informed consent was obtained from all participants.
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Im, HJ., Chu, M.K., Yang, K.I. et al. The association between social jetlag and depression is independent of sleep debt. Sleep Breath 27, 2459–2467 (2023). https://doi.org/10.1007/s11325-023-02849-6
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DOI: https://doi.org/10.1007/s11325-023-02849-6