Jillian Dorrian

Jillian Dorrian
University of South Australia | UniSA · UniSA Justice & Society

PhD MBiostats

About

217
Publications
53,065
Reads
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5,595
Citations
Citations since 2016
111 Research Items
3773 Citations
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Introduction
Professor Jill Dorrian has a PhD and a Master of Biostatistics. Jill works with sleep-deprived populations, including adolescents, pregnant women, and shiftworkers, to support health and safety. Much of Jill’s current work is focused on behavioural coping strategies for remaining healthy despite exposure to sleep loss. Along with colleagues in psychology, nutrition, and activity, she is working in chronobehaviour – investigating the health impacts, not only of what we do, but when we do it.
Additional affiliations
January 2020 - present
University of South Australia
Position
  • Managing Director
June 2017 - December 2019
University of South Australia
Position
  • Managing Director
March 2015 - present
University of South Australia
Position
  • Lecturer
Description
  • I teach courses in Health Psychology, Psychophysiology of Sleep, and Research Methods.
Education
June 2006 - March 2012
University of Melbourne
Field of study
  • Biostatistics
June 1999 - June 2003
University of South Australia
Field of study
  • Psychology
March 1995 - December 1998
University of Adelaide
Field of study
  • Psychology

Publications

Publications (217)
Chapter
Fatigue had classically been defined as a decrease in performance or performance capability as a function of time on task. This definition formed the basis for FAA duty time regulations for over 70 years, until January 2012, with the introduction of Part 117 Fatigue Risk Management (FRMP) regulations (FAA 14 CFR Part 117, 2013). Efforts to manage f...
Article
Full-text available
Introduction Shift-work results in misalignment between circadian timing and the sleep/wake schedule, negatively impacting sleep and performance. In encapsulated environments (e.g., submarines), the lack of strong daily lighting cues impairs circadian entrainment. This study tested whether circadian-informed LED lighting promotes greater circadian...
Article
Full-text available
Introduction Cortisol regulates multiple body systems and displays a distinct circadian rhythm. Nightshift disrupts this rhythm likely disturbing physiological processes regulated by cortisol. The cumulative effect of consecutive nightshifts, and eating during nightshift, on cortisol is unclear. This study aimed to determine the impact of four-cons...
Article
Full-text available
Introduction Physical activity, sedentary behaviour and sleep are associated with cognitive function in older adults. However, these behaviours are not independent, but instead make up exclusive and exhaustive components of the 24-h day. Few studies have investigated associations between 24-h time-use composition and cognitive function in older adu...
Article
Full-text available
Through systems thinking it is recognised that human error is not a matter of personal control, but an emergent property of overall system design. In the context of rail, Signal Passed at Danger (SPAD) incidents are a weak link in an otherwise safe system and one of the few points where a single failure can have catastrophic consequences. One area...
Article
Full-text available
Sleep and fatigue were investigated in aviation search and rescue, firefighting, emergency medical services and offshore transfer operations in 210 participants, for 21 days each, across 17 datasets in seven countries. Sleep data were collected using wrist-worn actigraphs and sleep diaries. Sustained attention was assessed using a 5-min Psychomotor...
Article
Background: It is unclear which allergic disease is most strongly related to which sleep problem and whether sleep problems may mediate the association between allergic disease and psychological distress. There is also a need for more community-based studies using non-referred samples. Objective: To examine the association between individual allerg...
Article
Full-text available
Introduction: Shift workers are at an increased risk of developing obesity and type 2 diabetes. Eating and sleeping out of synchronisation with endogenous circadian rhythms causes weight gain, hyperglycaemia and insulin resistance. Interventions that promote weight loss and reduce the metabolic consequences of eating at night are needed for night...
Article
Objectives To examine whether the association previously reported between mobile phone use at night and poor sleep in adolescents also generalizes to pre-adolescent children. Design Cross sectional. Setting Database provided by Resilient Youth Australia Pty Ltd. Participants Survey completed by 84,915 pre-adolescent (8-11 years), 99,680 early ad...
Article
Full-text available
Background: There is now robust evidence that when women settle to sleep on their back in late pregnancy (>28 weeks) they are at increased risk of stillbirth. Therefore, there are several stillbirth prevention programs worldwide that have begun advising pregnant women to adopt a side position when settling to sleep in late pregnancy. However, some...
Article
Full-text available
Train drivers work long hours on 24 h schedules and many factors impact their fatigue risk at work, creating a clear imperative for good rostering practice. Adopting a systems approach, this study investigated the relationship between multiple interrelated factors (train drivers’ schedule, sleep, wellbeing, and fatigue) and the perceived influence...
Article
Full-text available
Cardiovascular disease (CVD) poses a serious health and economic burden worldwide. Modifiable lifestyle factors are a focus of research into reducing the burden of CVD, with diet as one of the most investigated factors. Specifically, the timing and regularity of food intake is an emerging research area, with approaches such as time-restricted eatin...
Article
The relationships between cognitive function and each of physical activity, sleep and sedentary behaviour in older adults are well documented. However, these three “time use” behaviours are co-dependent parts of the 24-hour day (spending time in one leaves less time for the others), and their best balance for cognitive function in older adults is s...
Article
Full-text available
Introduction Approximately 40% of late-life dementia may be prevented by addressing modifiable risk factors, including physical activity and diet. Yet, it is currently unknown how multiple lifestyle factors interact to influence cognition. The ACTIVate Study aims to (1) explore associations between 24-hour time-use and diet compositions with change...
Article
Shiftworkers are more likely to suffer from gastrointestinal disease and Type 2 Diabetes than the general population, likely due to their altered dietary intakes. Previous research has suggested that coping strategies and health behaviours may be linked, however, questions remain regarding these relationships in shiftworking populations. The Standa...
Article
Full-text available
Unusual meal timing has been associated with a higher prevalence of chronic disease. Those at greater risk include shift workers and evening chronotypes. This study aimed to validate the content of a Chrononutrition Questionnaire for shift and non-shift workers to identify temporal patterns of eating in relation to chronotype. Content validity was...
Article
The aim of this review was to explore the extent and nature of evidence exploring shiftwork and disruptions to cortisol. A systematic search was conducted across five databases: Medline, EMBASE, Psych INFO, Joanna Briggs Institute and PubMed between July-August 2020. Cortisol data were characterised into three main outcomes, 1) cortisol levels, 2)...
Article
Understanding attitudes toward sharks and the factors associated with them is important for promoting positive attitudes and support for conservation initiatives. We aimed to investigate attitudes toward two different shark species in an Australian context: white sharks (Carcharodon carcharias, a species that can harm humans) and whale sharks (Rhin...
Article
Full-text available
Introduction Children commonly have access to mobile devices that allow them to send and receive texts at night when they should be sleeping. This may contribute to an increase in cyber-bullying and sleep problems, with negative effects on mental wellbeing. Methods Young children (7-11y, n = 22,597), early adolescents (12-14y, n = 19,470) and late...
Article
Full-text available
Nightwork is associated with fatigue, decreased sleep quality, and impairments in cognitive function. While attentional tasks have been widely investigated, there are limited data on more complex tasks, such as executive functioning during nightwork. Workers often need to rapidly shift between tasks, adapting to new and complex situations. The aim...
Article
Full-text available
Nightwork disrupts circadian rhythms and impairs glucose metabolism, increasing the risk for type 2 diabetes. We investigated eliminating or reducing the amount of food consumed during simulated nightwork as a countermeasure to reduce the impact of circadian disruption on glucose metabolism. N=52 healthy, non-shiftworking participants (24.4±4.9 yea...
Preprint
Full-text available
The relationships between cognitive function and each of physical activity, sleep and sedentary behaviour in older adults are well documented. However, these three time use behaviours are co-dependent parts of the 24-hour day (spending time in one leaves less time for the others), and their best balance for cognitive function in older adults is sti...
Preprint
Full-text available
Introduction Approximately 40% of late-life dementia may be prevented by addressing modifiable risk factors, including physical activity and diet. Yet, it is currently unknown how multiple lifestyle factors interact to influence cognition. The ACTIVate Study aims to 1) Explore associations between 24-hour time-use and diet compositions with changes...
Article
Circadian rhythms, metabolic processes, and dietary intake are inextricably linked. Timing of food intake is a modifiable temporal cue for the circadian system and may be influenced by numerous factors, including individual chronotype—an indicator of an individual’s circadian rhythm in relation to the light-dark cycle. This scoping review examines...
Article
Full-text available
Current evidence suggests that the ability to detect and react to information under lowered alertness conditions might be more impaired on the left than the right side of space. This evidence derives mainly from right-handers being assessed in computer and paper-and-pencil spatial attention tasks. However, there are suggestions that left-handers mi...
Chapter
In rail transportation, managing and mitigating the risk of Signal Passed at Danger (SPAD) incidents is a perennial challenge, with causation reflective of a systems issue. However, very little research has evaluated the role of SPAD Pro Formas—the documents used to collect and analyse information during investigation. A total of 208 internal inves...
Article
Objective: The sleep of individuals who provide unpaid care for children with medical needs is likely to be significantly impacted by this role. Sleep may be affected by the practical tasks undertaken during the night (e.g., administering medication), in addition to the emotional impact (e.g., worry, rumination). The aim of this systematic review...
Article
The Australian mass media frequently discusses sharks and shark-human interactions. There is initial evidence to suggest that this coverage could impact people’s perceptions of risk of sharks and in-turn people’s support for shark conservation initiatives. This current study utilises a mixed-method experimental design to investigate if perception o...
Article
Despite the risk of a shark attacking a human being statistically low, these interactions can cause people to fear sharks. A handful of previous studies have found that people often report a moderate fear of sharks (5.9–6.5 on a 10-point scale). The current study utilizes qualitative open-ended methodologies to understand people’s experiences with...
Article
Full-text available
Objective The commute home following a night shift is associated with an increased risk for accidents. This study investigated the relationship between food intake during the night shift and simulated driving performance post-shift. Methods Healthy non-shift working males (N=23) and females (N=16), aged 18-39 years (mean 24.5, standard deviation 5....
Preprint
Current evidence suggests that the ability to detect and react to information under lowered alertness conditions might be more impaired on the left than the right side of space. This evidence derives mainly from right-handers being assessed in computer and paper-and-pencil spatial attention tasks. However, there are suggestions that left-handers mi...
Article
Full-text available
Higher and lower levels of alertness typically lead to a leftward and rightward bias in attention, respectively. This relationship between alertness and spatial attention potentially has major implications for health and safety. The current study examined alertness and spatial attention under simulated shiftworking conditions. Nineteen healthy righ...
Article
Consuming coffee immediately prior to a nap, known as a caffeine-nap, has been shown to improve alertness during the day, but it is unknown whether a caffeine-nap is effective at reducing sleep inertia during the night. A simulated shiftwork cross-over laboratory study was conducted whereby participants (N = 6, 4 F, 21–36y) consumed 200 mg of caffe...
Article
Background: Residential support workers (RSWs) provide 24-hour care to clients and many work overnight sleepover nightshifts. Although RSWs perform safety-critical tasks and are at high-risk of work stress and exhaustion, the health and safety of RSWs has not been investigated. Objective: This explorative workplace case study explored the impact...
Article
Objective: Sleep disordered breathing (SDB) is associated with increased vascular resistance in children and adults. Persistent increased vascular resistance damages vascular endothelial cells-a marker of which is increased platelet activation. This study compared whole blood impedance platelet aggregation in children diagnosed clinically as SDB w...
Preprint
Higher and lower levels of alertness typically lead to a leftward and rightward bias in attention, respectively. This relationship between alertness and spatial attention potentially has major implications for health and safety. The current study examined alertness and spatial attention under simulated shiftworking conditions. Nineteen healthy righ...
Article
We examined whether sunlight affects hot flushes in working menopausal women and explored effect modification by shift work and season. In this prospective cohort study, daily hot flush score (outcome) was measured by the 7-day North Central Cancer Treatment Group Daily Vasomotor Symptoms Diary. Daily duration of sunlight (≥2000 lux) was recorded b...
Article
Background Mental health disorders are prevalent and costly to workplaces and individuals in Australia. Work-life interference is thought to contribute negatively. The interplay between work-life interference, depressive symptoms and sleep has not been explored to date in population data. The aims of this study were to establish whether sleep durat...
Article
Background: There is a disconnect between what maternity care providers consider should be done and what they actually do with respect to talking with their pregnant clients about reducing their risk of stillbirth. This suggests that they would benefit from receiving up-to-date knowledge about stillbirth, alongside education that provides them wit...
Conference Paper
Full-text available
Despite the focus on signal passed at danger (SPAD) incidents as a product of interactions in complex rail systems, few studies have identified salient precursors that could lead to SPADs. This descriptive study undertook an exploratory analysis of data collected from an international survey (Australia & New Zealand) to derive preliminary insight i...
Article
Altering meal timing could improve cognition, alertness, and thus safety during the nightshift. This study investigated the differential impact of consuming a meal, snack, or not eating during the nightshift on cognitive performance (ANZCTR12615001107516). 39 healthy participants (59% male, age mean±SD: 24.5 ± 5.0y) completed a 7-day laboratory stu...
Article
Full-text available
There is evidence to indicate that the central biological clock (i.e., our endogenous circadian system) plays a role in physiological processes in the body that impact energy regulation and metabolism. Cross-sectional data suggest that energy consumption later in the day and during the night is associated with weight gain. These findings have led t...
Article
Understanding shift workers dietary intake patterns may inform interventions targeted at lowering chronic disease risk. This study examined the temporal distribution of food intake as shift workers rotate between night shifts, day shift and/or days off to identify differences in energy intake, eating frequency, and adherence to dietary guidelines b...
Article
Full-text available
As most people will never encounter sharks in the wild, the media's portrayal of these animals is a key contributing factor to public perception of these species. Facebook is a common way for people to engage with news in Australia. Therefore, content and thematic analysis was conducted on a novel dataset comprising of 2,643 Facebook posts made by...
Article
In 24/7 operations, fatigue from extended work hours and shift work is ubiquitous. Fatigue is a significant threat to performance, productivity, safety, and well-being, and strategies for managing fatigue are an important area of research. At the level of individuals, the effects of fatigue on performance are relatively well understood, and counter...
Article
Conservation marketing holds potential as a means to engage audiences with biodiversity conservation and help to address the human dimensions of biodiversity loss. Empirical evaluations of conservation marketing indicatives are growing, so we reviewed the literature on this research to inform future directions in the field. We used a systematic sea...
Article
Full-text available
Shiftworkers report eating during the night when the body is primed to sleep. This study investigated the impact of altering food timing on subjective responses. Healthy participants (n = 44, 26 male, age Mean ± SD = 25.0 ± 2.9 years, BMI = 23.82 ± 2.59kg/m2) participated in a 7-day simulated shiftwork protocol. Participants were randomly allocated...
Article
Full-text available
Introduction Shiftwork is common in a 24/7 society. Shiftworkers experience circadian misalignment and disrupted daytime sleep and are more prone to errors and accidents than non-shiftworkers. Countermeasures such as caffeine and naps have been used to mitigate the attentional deficits associated with shiftwork, with inconsistent results. The aim o...
Article
Full-text available
Cardiovascular disease (CVD) risk in train drivers is associated with health conditions that can result in sudden incapacity. Drivers are at high risk on several CVD risk factors with research suggesting that sleep may predict CVD risk, however this relationship has not yet been explored. This study investigated the link between sleep and CVD risk,...
Article
OBJECTIVES: Unhealthy dietary profiles contribute to the elevated risk of chronic diseases for shift workers. There has been limited investigation into factors associated both with shift work and diet, such as sleep and mood, that may further influence food intake among shift workers. The aim of this study was to explore the relationship between sh...
Article
Sleep loss is one of the most common causes of accidents and errors in operational environments. Currently, no single method satisfies all of the requisite criteria of an effective system for assessing the risk of injury prior to safety being compromised. Research has concentrated towards the development of a biomarker for individualized assessment...
Article
The effects on dehydration and cognitive performance from heat and/or physical activity are well established in the laboratory, although have not yet been studied for personnel working in occupations such as wildland firefighting regularly exposed to these types of conditions. This study aimed to investigate the effects of temperature and dehydrati...
Chapter
An emerging literature is specifically focusing on the effects of sleep deprivation on aspects of social functioning and underlying neural changes. Two critical facets of social behavior emerge that are negatively impacted by sleep deprivation—self-regulation, which includes behavioral and emotional regulation, and social monitoring, which includes...
Article
Full-text available
More than seven billion mobile phones are estimated to be in service globally, with more than a billion older phones likely to be retired. A major barrier to a sustainable circular economy for mobile phones is people’s hoarding of their retired phones. Old mobile phones may be refurbished for re-use or ultimately dismantled for possible extraction...
Data
Data set for total number of phones donated yearly from 2009–2014. (PDF)
Data
Images showing additional details of three points of influence. (PDF)
Data
Data set for number of mobile phones donated monthly to Zoos Victoria from 2009–2014 and monthly zoo visitor numbers. (PDF)
Data
The connect–understand–act model. (PDF)
Data
Estimated amount of recoverable elements including conflict elements and landfill space saved. (PDF)
Article
Bullying is known to negatively impact the health of young people, but a less well appreciated sequelae is its impact on sleep. Disturbed sleep in-of-itself is known to also negatively impact health, raising the possibility that sleep disruption may explain some of the impact of bullying on health. Participants (n = 27,208, age = 9.7–17.7 years, 51...
Article
Shiftwork leads to altered eating patterns, with workers often eating foods at all times across the 24h period. Strategies to reduce the burden of shiftwork on the workers should be prioritised and altering these eating patterns is an important area for change. This narrative review examines the current evidence on the individual and environmental...
Article
Introduction: Social media interactions via email and instant messaging (E/IM) are common in children and adolescents and may lead to insufficient sleep. This study investigated associations between high-frequency E/IM use to interact with peers, perceived insufficient sleep, and reduced time in bed (TIB) in female children and adolescents. Methods...