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Greater bed- and wake-time variability is associated with less healthy lifestyle behaviors: a cross-sectional study

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Abstract

Aim

This study examines associations between the variability in bed/rise times, usual bed/rise time and dietary quality, physical activity, alcohol consumption, sitting time, sleep insufficiency and a composite index of behaviors.

Subject and methods

A random sample of Australian adults drawn from an online Panel cohort in 2013 completed a cross-sectional online survey. A total of 1,317 participants, median age 57 (IQR = 20) completed the survey. Bed- and wake times, variability in bed- and wake-times, dietary quality, physical activity, alcohol consumption, sitting time, sleep insufficiency and socio-demographics were assessed using a questionnaire. Associations were examined with generalized linear models.

Results

Having bed - times that varied by >30 min were associated with lower dietary quality, higher alcohol consumption, higher sitting time, more frequent insufficient sleep and poorer overall pattern of lifestyle behaviors. Greater variability in wake times, usual bed times and usual wake times were inconsistently associated with lifestyle behaviours.

Conclusions

Greater bed-time variability is associated with a less healthy pattern of lifestyle behaviors. Greater consistency in sleep timing may contribute to, or be reflective of, a healthier lifestyle.

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Acknowledgements

MJD is supported by a Future Leader Fellowship (ID 100029) from the National Heart Foundation of Australia.

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Authors

Corresponding author

Correspondence to Mitch J Duncan.

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Conflict of interest and adherence to ethical standards

Authors Duncan, Kline, Rebar, Vandelanotte, and Short declare that they have no conflict of interest. This study followed appropriate informed consent procedures and adhered to appropriate ethical standards and the Helsinki Declaration. This study was approved by Central Queensland University’s Human Research Ethics Committee.

Competing interests

The authors declare that they have no competing interests.

Author contributions

MJD conceived the study, analyzed the data, and drafted the manuscript. ALR and CEK assisted with developing analysis approach. All authors contributed to study design, interpretation of the results, and manuscript preparation. All authors have read and approved the final manuscript.

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Duncan, M.J., Kline, C.E., Rebar, A.L. et al. Greater bed- and wake-time variability is associated with less healthy lifestyle behaviors: a cross-sectional study. J Public Health 24, 31–40 (2016). https://doi.org/10.1007/s10389-015-0693-4

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  • DOI: https://doi.org/10.1007/s10389-015-0693-4

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