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Circadian Health
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Circadian Health

A special issue of International Journal of Environmental Research and Public Health (ISSN 1660-4601). This special issue belongs to the section "Health Behavior, Chronic Disease and Health Promotion".

Deadline for manuscript submissions: closed (30 April 2022) | Viewed by 11059

Special Issue Editors

Dr. Yu Sun Bin

E-Mail Website
Guest Editor
Charles Perkins Centre, Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
Interests: sleep and circadian health; jetlag; sleep and sleep disorders in pregnancy; trends in sleep; epidemiology; public health; health promotion
Dr. Svetlana Postnova

E-Mail Website
Guest Editor
School of Physics, University of Sydney, Sydney 2006, Australia
Interests: biophysical modelling; circadian rhythms; photobiology; sleep; alertness; neuroscience; complex biological systems
Prof. Dr. Chin Moi Chow

E-Mail Website
Guest Editor
Sydney School of Health Sciences, Faculty of Medicine and Health, University of Sydney, Sydney 2006, Australia
Interests: lifestyle factors and sleep health; circadian rhythms; sleep apnea; insomnia; depression; sleeping environment; electroencephalography; actigraphy
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Circadian disruption occurs when there is a mismatch between our internal biological time and the time in our environment, such as that seen in jetlag and shift work. Circadian disruption increases the risk of chronic conditions such as cancer, cardiovascular disease, diabetes, and obesity. In a 24/7 society, we spend more time indoors, thus reducing exposure to daylight, whilst at the same time increasing screen time and light exposure at night. Up to 1 in 5 of us are shift workers, and 1 in 3 will travel across time zones and incur jetlag every year. Circadian clocks regulate almost all physiological processes and affect our mood, physical performance, and cognitive capacity. However, the promotion of circadian health is a forgotten element of modern public health and education.

The circadian health framework provides a new, unifying approach to understanding the influence of both our environment and our behaviour on health. Circadian health considers the influence of both the natural and built environment on opportunities for light exposure and avoidance and for sleep, exercise, and eating behaviours which interact with the circadian system. Fundamental to this framework is the examination of the timing and pattern of health behaviours on outcomes, in addition to their quality, content, or intensity.

This Special Issue of the International Journal of Environmental Research and Public Health aims to bring together interdisciplinary research on the wide range of health behaviours and health outcomes that are affected by our circadian biology. Original research focused on understanding shift work, jetlag, light exposure, the timing of health behaviours, and the implications of circadian disruption on occupational safety, chronic disease, and mental health are welcomed.

Dr. Yu Sun Bin
Dr. Svetlana Postnova
Prof. Dr. Chin Moi Chow
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. International Journal of Environmental Research and Public Health is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2500 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • Light exposure and light therapy
  • Circadian disruption, shift work, jetlag, social jetlag
  • Chronotype
  • Sleep and sleep disorders
  • Physical activity, exercise, and athletic performance
  • Nutrition and diet
  • Chronic diseases
  • Mental health
  • Health promotion and education

Published Papers (3 papers)

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Research

10 pages, 954 KiB  
Article
Perturbation of Circadian Rhythm Is Associated with Increased Prevalence of Chronic Kidney Disease: Results of the Korean Nationwide Population-Based Survey
by Yina Fang, Serhim Son, Jihyun Yang, Sewon Oh, Sang-Kyung Jo, Wonyong Cho and Myung-Gyu Kim
Int. J. Environ. Res. Public Health 2022, 19(9), 5732; https://doi.org/10.3390/ijerph19095732 - 8 May 2022
Cited by 3 | Viewed by 2167
Abstract
Disturbances in circadian rhythms cause several health problems, such as psychosis, metabolic syndrome, and cancer; however, their effect on kidney disease remains unclear. This study aimed to evaluate the association between chronic kidney disease (CKD) and sleep disturbance in a Korean adult population. [...] Read more.
Disturbances in circadian rhythms cause several health problems, such as psychosis, metabolic syndrome, and cancer; however, their effect on kidney disease remains unclear. This study aimed to evaluate the association between chronic kidney disease (CKD) and sleep disturbance in a Korean adult population. A total of 17,408 participants who completed the National Health and Nutrition Examination Survey from 2016 to 2018 were assessed for their sleep patterns and renal function. CKD was defined as an estimated glomerular filtration rate ≤ 60 mL/min/1.73 m² or a positive dipstick urinalysis. Sleep onset time and sleep duration showed significant differences between the control and CKD groups (p < 0.001). After adjusting for the covariates, sleep onset time rather than sleep duration was independently associated with incidence of CKD, and this association was more significant in people who were older, in women, and in those with low body mass index and no comorbidities. When comparing the prevalence of newly diagnosed CKD according to sleep onset time in a population with no CKD risk factors or no history of CKD, the early bedtime group showed an independent association with incidence of new CKD (odds ratio (OR), 1.535; 95% confidence interval (CI), 1.011–2.330) even after adjusting for covariates. Impaired circadian rhythm along with sleep disturbance could be associated with CKD development; therefore, sleep disturbance might be an important therapeutic target for CKD. Full article
(This article belongs to the Special Issue Circadian Health)
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14 pages, 689 KiB  
Article
Impact of an Online Sleep and Circadian Education Program on University Students’ Sleep Knowledge, Attitudes, and Behaviours
by Caitlin R. Semsarian, Gabrielle Rigney, Peter A. Cistulli and Yu Sun Bin
Int. J. Environ. Res. Public Health 2021, 18(19), 10180; https://doi.org/10.3390/ijerph181910180 - 28 Sep 2021
Cited by 8 | Viewed by 3566
Abstract
University students consistently report poor sleep. We conducted a before-and-after study to evaluate the impact of an online 10-week course on undergraduate students’ sleep knowledge, attitudes, and behaviours at 6-month follow-up. Data were collected via baseline course surveys (August–September 2020) and follow-up surveys [...] Read more.
University students consistently report poor sleep. We conducted a before-and-after study to evaluate the impact of an online 10-week course on undergraduate students’ sleep knowledge, attitudes, and behaviours at 6-month follow-up. Data were collected via baseline course surveys (August–September 2020) and follow-up surveys distributed via email (February–March 2021). n = 212 students completed baseline surveys and n = 75 (35%) completed follow-up. Students retained to follow-up possessed higher baseline sleep knowledge and received higher course grades. At the 6-month follow-up, sleep knowledge had increased (mean score out of 5: 3.0 vs. 4.2, p < 0.001). At baseline, 85% of students aimed to increase their sleep knowledge and 83% aimed to improve their sleep. At follow-up, 91% reported being more knowledgeable and 37% reported improved sleep. A novel Stages of Change item revealed that 53% of students’ attitudes towards their sleep behaviours had changed from baseline. There was a reduction in sleep latency at follow-up (mean 33.3 vs. 25.6 min, p = 0.015), but no change in the total Pittsburgh Sleep Quality Index score. In summary, completion of an online course led to increased sleep and circadian knowledge and changed sleep attitudes, with no meaningful change in sleep behaviours. Future interventions should consider components of behavioural change that go beyond the knowledge–attitudes–behaviour continuum. Full article
(This article belongs to the Special Issue Circadian Health)
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15 pages, 369 KiB  
Article
Health Risks and Potential Predictors of Fatigue and Sleepiness in Airline Cabin Crew
by Candice C. Y. Wen, Christian L. Nicholas, Sandy Clarke-Errey, Mark E. Howard, John Trinder and Amy S. Jordan
Int. J. Environ. Res. Public Health 2021, 18(1), 13; https://doi.org/10.3390/ijerph18010013 - 22 Dec 2020
Cited by 13 | Viewed by 4103
Abstract
Background: Aviation pilots and cabin crew regularly undertake shift work, and may experience circadian disruption, restricted sleep, sleepiness and impaired health. Research on aviation fatigue and sleepiness has focused on pilots, with less being known about cabin crew. This study aimed to identify [...] Read more.
Background: Aviation pilots and cabin crew regularly undertake shift work, and may experience circadian disruption, restricted sleep, sleepiness and impaired health. Research on aviation fatigue and sleepiness has focused on pilots, with less being known about cabin crew. This study aimed to identify likely predictors of fatigue, sleepiness, shift work disorder (SWD) and depression in cabin crew. Methods: An online anonymous survey was distributed to active cabin crew around the world. It measured sleepiness, fatigue, and screened for insomnia, depression and SWD. Information on individuals’ habits and work schedules were collected. Results: 930 valid responses were analysed. 63.5% of the sample had abnormal levels of fatigue and 46.9% experienced excessive daytime sleepiness. 68.0% were at risk for SWD, 57.7% screened positive for insomnia, and 40.0% for depression. Caffeine and use of alcohol and drugs for sleep were independently associated with insomnia and SWD (p < 0.05), whereas, type of route (international, domestic, both) and number of duty days per week predicted fatigue (p < 0.05). Conclusions: Cabin crew had a high prevalence of fatigue, sleepiness and elevated risk for SWD, insomnia and depression. Many cabin crew engaged in behaviours detrimental to good sleep hygiene, highlighting targets for future interventional studies. Full article
(This article belongs to the Special Issue Circadian Health)
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