The impact of shift work on eating patterns and self-care strategies utilised by experienced and inexperienced nurses

Barriers and Facilitators to Healthy Eating for Shift-Work-Registered Nurses in Hong Kong Public Hospitals: An Exploratory Multi-Method Study

Background/Objectives: Shift work has profound effects on the health and dietary habits of registered nurses, especially in Hong Kong, where cultural and systematic barriers can pose a challenge. This study investigated the dietary habits of shift-working nurses in public hospitals, identifying barriers and facilitators to healthy eating using a mixed-methods approach. Methods: Nine subjects (five females and four males: mean = 35.6, SD = 8.4 yrs) filled out a validated food frequency questionnaire and a 3-day dietary record followed by photovoice and semi-structured interview. Results: The findings indicated that all participants reported insufficient dietary fiber intake and eight out of nine exceeded sodium intake recommendations. The key barriers included emotional eating triggered by work stress, inconsistent schedules, limited availability of nutritious foods, and workplace social dynamics. The facilitators included workplace support, positive peer influence, and family involvement in meal planning. Conclusions: This paper focuses on the necessity for health care institutions to create and implement nutritional instructions specific to shift workers, maintain appropriate meal breaks, and build a positive work environment. These interventions may be used to enhance nurses' eating habits and well-being.

Working From Dusk to Dawn: A Joy or Nightmare

Nurses are needed to work night shift because patients in acute care, subacute, and long-term care facilities require round-the-clock care. A systematic review on the experiences and perceptions of nurses working the night shift in varied settings found the night shift work environment is different and night shift nurses juggle their sleep and deal with ongoing sleep deprivation. Based on the systematic review and the evidence that forewarns of the physical and psychological burden of night shift work, recommendations are made for employers and nurses to navigate the challenges posed to those working against their circadian rhythm.

Weight and Lifestyle Behavior Changes in Chinese Health Care Workers During the COVID-19 Pandemic: 3-Year Retrospective Survey

BACKGROUND

Health care workers (HCWs) played a key role in preventing and controlling COVID-19. Higher infection risks and intensive work led to occupational burnout for many HCWs, which may affect their lifestyle behaviors and weight.

OBJECTIVE

This study aimed to assess HCWs' self-rated health status, overweight and obesity rates, lifestyle behaviors, and psychoemotional changes from 2019 to 2022 across China and to analyze the factors associated with changes from underweight or normal weight in 2019 to overweight or obese in 2022.

METHODS

In this retrospective study, 100 health care institutions were randomly selected from 5 provinces or regions in China. All HCWs who worked in the institutions for at ≥3 years were invited to complete the electronic questionnaire and participate in the online survey from August 1, 2022, to August 31, 2022. Collected data included changes in lifestyle behaviors (dietary habits, physical activity, sleep quality, smoking, alcohol consumption), psychoemotional conditions (persistent stress or recurrent anxiety or depressed mood), health status, and chronic disease control from December 2019 to August 2022. Height and weight in 2019 and 2022 were retrieved from annual physical examination records. Overweight and obesity were defined as 24.0 kg/m2≤BMI<28.0 kg/m2 (overweight) and BMI≥28.0 kg/m2 (obesity). Chi square tests and ANOVAs were used to assess the associations between groups. Logistic regression models were used to analyze the factors associated with HCWs becoming overweight or obese from 2019 to 2022.

RESULTS

The questionnaire was submitted by 23,234 HCWs. Of the underweight or normal weight HCWs in 2019, 12.67% (1486/23,234) became overweight or obese in 2022; this change was associated with the following factors: 34-43 years old (OR 0.843, 95% CI 0.740-0.960), 44-53 years old (OR 0.738, 95% CI 0.635-0.960), and 54-63 years old (OR 0.503, 95% CI 0.368-0.685; reference: 24-33 years old), reduction in or never or rarely engaging in physical activity (OR 1.201, 95% CI 1.055-1.368; reference: increase in physical activity; P=.006), increased appetite (OR 2.043, 95% CI 1.788-2.034; reference: reduction or no change in appetite; P<.001). From 2019 to 2022, 51.29% (11,917/23,234) of the respondents experienced increased persistent stress or recurrent anxiety or depressed mood; 44.38% (10,311/23,234) stayed up late more often. Increased persistent stress or recurrent anxiety or depressed mood was associated with physical activity (OR 0.421, 95% CI 0.398-0.447; P<.001) and appetite (OR 1.601, 95% CI 1.483-1.728; P<.001).

CONCLUSIONS

The pandemic was associated with overweight and obesity for HCWs due to changes in lifestyle behaviors, especially reduced physical activity and increased appetite related to increased persistent stress or recurrent anxiety or depressed mood caused by excessive workload. An integrated approach is needed to address overweight and obesity and lifestyle changes among HCWs by releasing negative psychoemotional conditions through workload reduction in future stressful events.

An evaluation of sleep quality and nutritional status in nurses with different chronotypes

This study was conducted to investigate the effect of shift work on the sleep quality and nutritional status of nurses with different chronotypes. The study was designed to include 21 people from each chronotype and was completed with 60 participants. The participants were asked to record their food consumption during three different types of shifts they worked over a period of three days. We found that the Pittsburgh Sleep Quality Index (PSQI) score of the evening types was higher than that of the morning types (p < 0.05). The evening types had significantly higher weight, BMI, waist circumference, hip circumference, waist-to-height ratio and neck circumference measurements than the morning types (p < 0.05). The daily energy, fat and SFA intakes of the morning types were significantly higher for those working 16:00-08:00 and 08:00-08:00 compared to those working 08:00-16:00 (p < 0.05). The highest carbohydrate intake was between 08:00-08:00. The amount of carbohydrate, energy and SFA consumed by the intermediate types between 08:00 and 08:00 was significantly higher than that consumed between 08:00 and 16:00. Chronotype and shift hours should also be taken into account when developing nutrition plans for participants who work shifts.

Healthy from the Start: Co-Designing Sleep, Nutrition and Physical Activity Resources for Young Shiftworkers-Novel Implementation and Evaluation

INTRODUCTION

The increasing prevalence of shiftwork among young adults poses significant health risks, primarily due to its disruptive effects on sleep, nutrition and physical activity. Addressing these risks necessitates the development of tailored, evidence-based resources to support these key health behaviours. Participatory research approaches, engaging those with relevant lived experience (i.e., co-design) are a novel and effective approach in developing these resources. As such, the aim of the present study was to explore whether sleep, nutrition and physical activity resources for young shiftworkers could be developed using participatory, co-design approaches and how co-designers would rate both the approaches used and the resulting resources.

METHODS

A participatory approach engaged co-designers (young, experienced or previous shiftworkers; workplace health and safety specialists; science communicators and academic experts) to complete 2-3 online questionnaires and participate in 1-2 online workshops, to co-design sleep, nutrition and physical activity resources for young shiftworkers. Following resource development, co-designers assessed both the participatory approach and the resulting resources, through an online questionnaire, which included the Public and Patient Engagement Evaluation Tool (PPEET).

RESULTS

Co-designers (n = 48) participated in the development of sleep, nutrition and physical activity resources for young shiftworkers. Co-designers evaluated the participatory approach positively, with a mean rating across all PPEET items of 4.7 (±0.2) on a 5-point Likert scale. Co-designers also provided positive ratings for the resources, with the majority (91.7%) either agreeing or strongly agreeing that they were user-friendly, valuable and informative for young shiftworkers and would serve as a credible source of health information.

CONCLUSION

By adopting a novel participatory approach, we successfully co-designed sleep, nutrition and physical activity resources for young shiftworkers. Participatory approaches, including co-design, should be considered when developing health interventions for shiftworkers, given the value of embedding lived experience to address their unique lifestyle challenges.

PATIENT OR PUBLIC CONTRIBUTION

Co-designers and/or people with relevant lived experience were involved in all project activities: conceptualisation, design, recruitment, data collection, data analysis, knowledge translation and output generation.

Comparing Human-Smartphone Interactions and Actigraphy Measurements for Circadian Rhythm Stability and Adiposity: Algorithm Development and Validation Study

BACKGROUND

This study aimed to investigate the relationships between adiposity and circadian rhythm and compare the measurement of circadian rhythm using both actigraphy and a smartphone app that tracks human-smartphone interactions.

OBJECTIVE

We hypothesized that the app-based measurement may provide more comprehensive information, including light-sensitive melatonin secretion and social rhythm, and have stronger correlations with adiposity indicators.

METHODS

We enrolled a total of 78 participants (mean age 41.5, SD 9.9 years; 46/78, 59% women) from both an obesity outpatient clinic and a workplace health promotion program. All participants (n=29 with obesity, n=16 overweight, and n=33 controls) were required to wear a wrist actigraphy device and install the Rhythm app for a minimum of 4 weeks, contributing to a total of 2182 person-days of data collection. The Rhythm app estimates sleep and circadian rhythm indicators by tracking human-smartphone interactions, which correspond to actigraphy. We examined the correlations between adiposity indices and sleep and circadian rhythm indicators, including sleep time, chronotype, and regularity of circadian rhythm, while controlling for physical activity level, age, and gender.

RESULTS

Sleep onset and wake time measurements did not differ significantly between the app and actigraphy; however, wake after sleep onset was longer (13.5, SD 19.5 minutes) with the app, resulting in a longer actigraphy-measured total sleep time (TST) of 20.2 (SD 66.7) minutes. The obesity group had a significantly longer TST with both methods. App-measured circadian rhythm indicators were significantly lower than their actigraphy-measured counterparts. The obesity group had significantly lower interdaily stability (IS) than the control group with both methods. The multivariable-adjusted model revealed a negative correlation between BMI and app-measured IS (P=.007). Body fat percentage (BF%) and visceral adipose tissue area (VAT) showed significant correlations with both app-measured IS and actigraphy-measured IS. The app-measured midpoint of sleep showed a positive correlation with both BF% and VAT. Actigraphy-measured TST exhibited a positive correlation with BMI, VAT, and BF%, while no significant correlation was found between app-measured TST and either BMI, VAT, or BF%.

CONCLUSIONS

Our findings suggest that IS is strongly correlated with various adiposity indicators. Further exploration of the role of circadian rhythm, particularly measured through human-smartphone interactions, in obesity prevention could be warranted.

Migraine incidence and coffee consumption among child-bearing age women: the Korea Nurses' Health Study

This longitudinal study aimed to identify factors that influence migraines in Korean women nurses using data from the Korea Nurses' Health Study. Among those who participated in Survey 1 (2013-2014) and the follow-up survey (2015-2019), we selected 2605 participants for Cox proportional hazard regression analysis, 521 participants who were newly diagnosed with migraine and 2084 controls using a 1:4 incidence density sampling approach. Consuming coffee (≥ 3 cups: RR = 1.666; 95% CI = 1.175-2.362, < 3 cups: RR = 1.439; 95% CI = 1.053-1.966), being obese (BMI ≥ 25: RR = 1.341, 95% CI = 1.003-1.793), and engaging in vigorous physical activity (RR = 1.010; 95% CI = 1.000-1.019) increased the risk of developing a migraine. Nurses with an annual salary greater than $3500 were less likely to develop migraines (RR = 0.786, 95% CI = 0.631-0.979). The results imply that lifestyle factors, such as the amount of coffee consumption, BMI level, and degree of physical activity could be considered when formulating treatment plans for women who have newly developed migraines.

Workplace barriers and facilitators to nurses' healthy eating behaviours: a qualitative systematic review

BACKGROUND

Globally, nurses and midwives have a higher rate of being overweight/obese than the general population, influenced by workplace environments that impact dietary habits.

OBJECTIVE

This systematic review aimed to identify barriers/facilitators to healthy eating among nurses in clinical settings.

DESIGN

This systematic review followed Joanna Briggs Institute's guidelines for qualitative systematic reviews.

METHODS

Eight electronic databases: PROQUEST CENTRAL, SCIENCEDIRECT, MEDLINE, CINAHL, PsycINFO, WEB SCIENCE, PUB MED, and SCOPUS were searched. Articles were screened using JBI SUMARI®, and quality assessment was done using the JBI critical appraisal checklist. Data were extracted using the JBI data extraction tool.

RESULTS

Nine qualitative studies were reviewed, involving 488 nurses, concluding 37 distinct findings. Two synthesised findings emerged: barriers, and facilitators to healthy eating, related to organisational (shift work/long working hours), personal, physical workplace environment, and social factors.

CONCLUSIONS

The review emphasises the necessity of promoting attainable healthy eating practices at organisational, personal, environmental, and social levels within the workplace.

REGISTRATION

PROSPERO International prospective register of systematic reviews, ID: CRD42022309259.

Meal timing and its role in obesity and associated diseases

Meal timing emerges as a crucial factor influencing metabolic health that can be explained by the tight interaction between the endogenous circadian clock and metabolic homeostasis. Mistimed food intake, such as delayed or nighttime consumption, leads to desynchronization of the internal circadian clock and is associated with an increased risk for obesity and associated metabolic disturbances such as type 2 diabetes and cardiovascular diseases. Conversely, meal timing aligned with cellular rhythms can optimize the performance of tissues and organs. In this review, we provide an overview of the metabolic effects of meal timing and discuss the underlying mechanisms. Additionally, we explore factors influencing meal timing, including internal determinants such as chronotype and genetics, as well as external influences like social factors, cultural aspects, and work schedules. This review could contribute to defining meal-timing-based recommendations for public health initiatives and developing guidelines for effective lifestyle modifications targeting the prevention and treatment of obesity and associated metabolic diseases. Furthermore, it sheds light on crucial factors that must be considered in the design of future food timing intervention trials.

Exploration of the individual, social and environmental factors influencing dietary behaviour in shift workers with type 2 diabetes working in UK healthcare-The Shift-Diabetes Study: A qualitative study using the theoretical domains framework

AIM

To identify factors influencing dietary behaviour in shift workers with type 2 diabetes (T2D) working in UK healthcare settings.

METHODS

Semi-structured qualitative interviews based on the theoretical domains framework (TDF) were conducted with a convenience sample (n = 15) of shift workers (32-59 years) diagnosed with T2D who worked night shifts as part of a mixed shift schedule. The TDF was applied to analyse transcripts using a combined deductive framework and inductive thematic analysis approach. Identified influences were mapped to the behaviour change technique taxonomy to identify potential strategies to change dietary behaviour in this context.

RESULTS

Key barriers to healthy dietary behaviours were access and cost of food available during night work (TDF domain: Environment Context and Resources). Factors identified as both enablers and barriers included: availability of staff facilities and time to take a break, (Environment Context and Resources), the physical impact of night work (Beliefs About Consequences), eating in response to stress or tiredness (Emotion), advance planning of meals/food and taking own food to work (Behavioural Regulation). Potential techniques to address these influences and improve dietary behaviour in this context include: meal planning templates, self-monitoring and biofeedback, and increasing accessibility and availability of healthier food choices during night shifts.

CONCLUSIONS

The dietary behaviour of shift workers with T2D is influenced by interacting individual, socio-cultural and environmental factors. Intervention should focus on environmental restructuring and strategies that enable monitoring and meal planning.

Effect of Cereal Consumption (Frugra®) on Autonomic Nervous System Function in Healthcare Workers Who Skip Breakfast

In this study, we aimed to clarify the effects of breakfast intervention on autonomic nerve function in healthcare workers who skip breakfast. This cross-sectional, interventional study was conducted between January 2020 and December 2021. All participants were full-time healthcare workers who completed a self-administered questionnaire on fatigue and subjective symptoms and underwent noninvasive autonomic nerve function tests. "Skippers" were defined as individuals who ate breakfast <4 times per week, and "eaters" were those who ate breakfast >4 times per week. We introduced a cereal, Frugra (Calbee, Inc.), to skippers who opted for the breakfast intervention. Subsequently, they completed the questionnaire again and repeated the autonomic nerve function tests. Among 196 participants (age [mean±SD]: 29.8±7.8 y; 177 women and 19 men), 120 were categorized as skippers and 76 as eaters. In the skipper group, more participants were nurses, lived alone, and worked the night shift than in the eater group. The Chalder Fatigue Scale (CFS) score in the skipper group was higher than that in the eater group, although not significantly. Regarding autonomic nerve function, no significant differences were observed between the groups. In 50 skippers who opted for the breakfast intervention, the CFS score significantly decreased after 4 wk. Log low frequency and log coefficient of component variance total power significantly increased, whereas log high frequency increased, but not significantly, after the intervention. In conclusion, for healthcare workers who were breakfast skippers, the consumption of breakfast cereal reduced their fatigue level and improved their autonomic nervous system activity.

Dietary Patterns under the Influence of Rotational Shift Work Schedules: A Systematic Review and Meta-Analysis

Workers employed in rotating shift schedules are at a higher metabolic risk compared with those in regular day and fixed shift schedules; however, the contribution of diet is unclear. This systematic review aimed to investigate how rotating shift work schedules affect dietary energy intake and dietary patterns compared with regular day and fixed shift schedules. In addition, intraperson energy intake and dietary pattern comparisons within rotating shift schedules were investigated. Database searches were conducted on MEDLINE, Cochrane, CINAHL, PSYCinfo, EMBASE, and Scopus, in addition to manual search of bibliographic references, to identify articles. Two separate meta-analyses compared dietary intake between day work and rotating shift work schedules and within the rotational shift work group (morning/day and night shifts). Differences in dietary patterns were synthesized narratively. Thirty-one studies (n = 18,196 participants) were included in the review, and meta-analyses were conducted with 24-hour mean energy intake data from 18 (n = 16,633 participants) and 7 (n = 327 participants) studies, respectively. The average 24-hour energy intake of rotating shift workers was significantly higher than that of workers in regular daytime schedules [weighted mean difference (WMD): 264 kJ; 95% confidence interval (CI): 70, 458 kJ; P < 0.008; I2 = 63%]. However, the mean difference in 24-hour energy intake between morning/day shifts compared with night shifts within rotational shift schedules was not statistically significant (WMD: 101 kJ; 95% CI: -651, 852 kJ; P = 0.79; I2 = 77%). Dietary patterns of rotating shift workers were different from those of day workers, showing irregular and more frequent meals, increased snacking/eating at night, consumption of fewer core foods, and more discretionary foods. This review highlights that dietary intake in rotational shift workers is potentially higher in calories and features different eating patterns as a consequence of rotating shift work schedules. This review was registered at PROSPERO as ID 182507.

Proceedings of a roundtable event 'Workplace Diet and Health - priorities for researchers and practitioners'

Understanding how the work environment impacts health behaviours is essential to a life course approach in public health nutrition. A roundtable event 'Workplace Diet and Health - priorities for researchers and practitioners' was held by the Nutrition Society in October 2022. The overarching aims of the roundtable event were to consider (i) the relevance of nutritional wellbeing for employers and organisations, (ii) the research priorities for workplace diet and health and (iii) how researchers and practitioners can work with stakeholders in the development and testing of workplace diet and health interventions and nutritional education. Participants represented a range of stakeholders including dietetic and nutrition professionals working in workplace health, academics and science communication with an interest in workplace diet and health, non-governmental organisations and providers of workplace nutritional health and wellbeing programmes. All roundtable participants agreed that good nutrition and access to healthy food at work was part of corporate responsibility comparable to that of health and safety provision. It was recognised that nutritional wellbeing was not seen as a priority by many companies due to the complexity and wide range of employee health and wellbeing options available and the perceived lack of clear financial benefit. Three priority areas were identified and agreed upon by roundtable participants: (1) strengthening the evidence base to demonstrate the tangible benefit of nutritional wellbeing interventions in the workplace, (2) creating a knowledge exchange hub to share best practices and experiences of working across sectors and (3) expand stakeholder engagement in workplace nutritional wellbeing.

The Relationship Between Depression, Anxiety, and Stress Levels and Eating Behavior in Emergency Service Workers

Introduction It is seen that shift work causes various biological, psychological, and behavioral problems in individuals. This study aimed to determine the eating attitudes and behaviors of health workers working in shifts in a stressful environment such as the emergency service and to examine the relationship between depression, anxiety, and stress levels and eating behaviors (emotional eating, restrictive eating, and external eating) in terms of sociodemographic and clinical characteristics. Material and Methods Sociodemographic data form; Depression, Anxiety, and Stress Scale (DASS); and Dutch Eating Behavior Questionnaire (DEBQ) were used. The study sample consisted of 92 employees (doctor, nurse, emergency medical technician (EMT), medical secretary, and security, staff) who were actively on duty in the emergency department of Alanya Alaaddin Keykubat University Medical Faculty Training and Research Hospital. Results In our study, when the eating behavior of emergency service workers was evaluated in terms of "emotional, external, and restricted eating" sub-dimensions, depression (p=0.043), anxiety (p=0.017), increased stress levels (p=0.002), being female (p=0.022), nurse-emergency medical technician profession (p=0.001), working in 24-hour shifts (p=0.001), and diet history (p=0.013) were associated with "emotional eating." In addition, an increase in depression levels (p=0.048), being single (p=0.015), working in 24-hour shifts (p=0.005), a decrease in age (p<0.001) with "extrinsic eating," an increase in body mass index (BMI) (p=0.020) and waist circumference (p=0.049), and diet history (p<0.001) were associated with "restricted eating." Conclusions In our study, among the sociodemographic factors, being female, being single, working in 24-hour shifts, diet history, nurse-EMT profession, and undergraduate education level were found to increase the tendency to develop eating behavior problems. An increase in depression levels, being single, working in 24-hour shifts, and a decrease in age were associated with "extrinsic eating." There is a correlation between depression, anxiety, and stress scores and emotional eating scores. Additionally, we found significant correlations between body mass index, waist circumference, diet history, and restricted eating scores. In the approach to eating behavior problems, it is important to determine the individual eating behavior disorder. Due to the increased risk of eating behavior disorder in those who work in long shifts such as 24 hours, it will be possible to organize work programs and increase the quality of service.

Enablers and barriers to healthy eating among hospital nurses: A systematic review

BACKGROUND

Nurses are the largest health professional body globally. Despite the significant role they play in healthcare, nurses exhibit poor dietary habits and have high rates of chronic diseases. Understanding the factors underlying healthy eating for nurses in the workplace is important to implement effective interventions.

OBJECTIVE

To identify enablers and barriers related to healthy eating among nurses employed in a hospital setting.

DESIGN

A systematic literature review of qualitative, quantitative, and mixed methods research (PROSPERO ID: CRD42021290913).

DATA SOURCES

A comprehensive systematic search was conducted across PubMed, CINAHL, Embase, Web of Science and ProQuest databases for papers published after January 2015.

METHODS

Two authors independently screened titles and abstracts of 4139 deduplicated studies, performed critical appraisals on eligible studies using the Mixed Methods Appraisal Tool and extracted data relevant to the research question. This review includes papers that examined nurses' eating behaviours specifically, were conducted in a hospital setting and distinguished healthy eating from other behaviours. Data synthesis was conducted through descriptive summarisation of studies and enablers and barriers were classified according to the socio-ecological model.

RESULTS

A total of 29 studies were identified with 8024 participants. 8 studies were qualitative, 18 quantitative, and 3 were mixed method design. At an environmental level, barriers were high accessibility and availability of unhealthy foods, high cost and low availability of healthy foods and lack of storage and preparation facilities, while an enabler was close proximity to healthy options. Novel organisational enablers were considered roster planning which allowed for established routines around meals, and structured workplace programs that encouraged improvement in health behaviours, while barriers were shift work, inconsistent rosters and high work demands. An interpersonal enabler was supportive networks while barriers were work culture, social norms of celebrations and gifts of food from patients. Finally, intrapersonal barriers were stress and fatigue, personal values, beliefs, attitudes, and individual characteristics, with the latter two also acting as enablers.

CONCLUSIONS

This review identifies the complexity and interconnectedness of enablers and barriers to healthy eating across four domains of the socio-ecological model. Multi-faceted strategies which address factors across several domains are recommended for healthcare organisations to facilitate healthy eating among nurses. Further research is needed to assess these strategies and understand the extent to which eating behaviours can be improved.

Experiences and perceptions of nurses working night shift: a qualitative systematic review

OBJECTIVE

The objective of this review was to examine the available evidence on the experiences and perceptions of nurses working the night shift within any specialty in the acute care, subacute, or long-term care setting.

INTRODUCTION

Nurses are required for around-the-clock patient care. Night shift nurses can experience detrimental effects because of their work hours, which disrupt their normal circadian rhythm. Understanding nurses' experiences and perceptions when working night shift will facilitate the development of strategies to minimize the potential negative effects of working at night. In examining nurses' experiences and perceptions of working night shift, there is scope to explore how to improve night shift nurses' practice environment and job satisfaction, which will then translate to improved nurse and patient outcomes.

INCLUSION CRITERIA

This review included qualitative studies focused on the experiences and perceptions of registered nurses and licensed practical nurses who work the night shift or rotate between day and night shift.

METHODS

This review followed the JBI methodology for systematic reviews of qualitative evidence. The methodology used was consistent with the a priori protocol. Studies included in this review were those published in full text, English, and between 1983 (when the seminal work on hospitals that attract and retain nurses was published) and February 2021, when the search was completed. The main databases searched for published and unpublished studies included MEDLINE, CINAHL, Embase, PsycINFO, and Web of Science.From the search, two reviewers independently screened the studies against the inclusion criteria, and then papers selected for inclusion were assessed for methodological quality. Qualitative data were extracted from the included papers independently by the four reviewers. Results from each reviewer were discussed and clarified to reach agreement. The extracted findings were pooled and examined for shared meaning, coded, and grouped into categories. Common categories were grouped into meta-synthesis to produce a comprehensive set of synthesized findings. The final synthesized findings were graded using the ConQual approach to determine the level of confidence (trust) users may have in the value of the synthesized findings.

RESULTS

Thirty-four papers, representing 33 studies, met the criteria for inclusion. The studies were conducted in 11 countries across six continents, with a total of 601 participants. From these, a total of 220 findings were extracted and combined to form 11 categories based on similarity in meaning, and three syntheses were derived: i) The "Other" Shift: the distinctiveness of night nursing; ii) Juggling sleep and all aspects of life when working nights; and iii) Existing in the Twilight Zone: battling the negative impact of sleep deprivation consumes nurses who strive to keep patients, self, and others safe.

CONCLUSIONS

The major conclusions from this review are the uniqueness of working the night shift and the sleep deprivation of night nurses. Organizational strategies and support are needed for those working this shift, which will enhance nurse and patient safety.

SYSTEMATIC REVIEW REGISTRATION NUMBER

PROSPERO CRD42019135294.

The Impact of Job-Demand-Control-Support on Leptin and Ghrelin as Biomarkers of Stress in Emergency Healthcare Workers

Despite the available literature on the consequences of night shiftwork on stress and food intake, its impact on leptin and ghrelin has never been studied. We previously demonstrated that leptin and ghrelin were biomarkers related to stress, and acute stress-induced a decrease in leptin levels and an increase in ghrelin levels. We performed a prospective observational study to assess the influence of night work, nutrition, and stress on the levels of ghrelin and leptin among emergency healthcare workers (HCWs). We took salivary samples at the beginning of a day shift and/or at the end of a night shift. We also monitored stress using the job demand-control-support model of Karasek. We recorded 24-h food intake during the day shift and the consecutive night shift and during night work and the day before. We included 161 emergency HCWs. Emergency HCWs had a tendency for decreased levels of leptin following the night shift compared to before the dayshift (p = 0.067). Furthermore, the main factors explaining the decrease in leptin levels were an increase in job-demand (coefficient -54.1, 95 CI -99.0 to -0.92) and a decrease in job control (-24.9, -49.5 to -0.29). Despite no significant changes in ghrelin levels between shifts, social support was the main factor explaining the increase in ghrelin (6.12, 0.74 to 11.5). Food intake (kcal) also had a negative impact on leptin levels, in addition to age. Ghrelin levels also decreased with body mass index, while age had the opposite effect. In conclusion, we confirmed that ghrelin and leptin as biomarkers of stress were directly linked to the job demand-control-support model of Karasek, when the main cofounders were considered.

Ubiety in nursing practice: Making each patient the star of the minute

Nurses work in a fast-paced environment with increased expectations and distractions. Ubiety is a new concept that describes how nurses care for one patient at a time amid distractions. The purpose of this study was to explore the experiences of exemplar registered nurses (Daisy Award nurse nominees) in practicing ubiety when caring for patients in an acute care setting. Qualitative data was collected through semistructured interviews and analyzed. "Making each patient the star of the minute" emerged as the main theme and included five subthemes which highlight how nurses practice ubiety: (1) anticipating and managing distractions, (2) putting my whole self in, (3) nurse self-preservation, (4) my nursing identity, and (5) favorable practice environment. Results of this study highlight the importance of developing skills to anticipate patient care needs and supporting individual self-preservation strategies for nurses.

Shift Work and Obesity Risk-Are There Sex Differences?

PURPOSE OF REVIEW

Shift work is prevalent among the working population and is linked to an array of adverse health outcomes. This review summarizes current evidence on the relation between shift work and risk of obesity, with a particular emphasis on potential sex differences.

RECENT FINDINGS

Observational data strongly point towards an association between shift work and heightened risk of prevalent and incident obesity, and particularly abdominal obesity. Circadian misalignment and unhealthy lifestyle behaviors are the primary culprits mediating such association. As it pertains to sex differences in the impact of shift work on obesity, few studies have examined this aspect, and findings are conflicting. Shift work is an important risk factor for obesity, with likely multiple biological and behavioral mediators. However, whether there is a sex-dependent vulnerability to the obesogenic effects of shift work is unclear. This area presents opportunities for future research.

Barriers in adopting health-promoting behaviours among nurses: A qualitative systematic review and meta-synthesis

AIMS

Nursing is a highly stressful occupation where irregular shifts and working overtime lead to unhealthy behaviours. This qualitative systematic review and meta-synthesis aims to examine nurses' barriers in adopting health-promoting behaviours.

METHODS

Six electronic databases were searched from their respective inception dates to October 2021: EMBASE, Web of Science, PubMed, PsycINFO, CINAHL and ProQuest Dissertations and Theses. The Critical Appraisal Skills Program checklist was used to appraise the quality of included studies. Data synthesis followed Sandelowski's and Barroso's two-step approach.

RESULTS

Fourteen studies were included in this review, and three themes were generated as follows: (1) work environment and workplace culture, (2) nature of the job and (3) intrinsic factors.

CONCLUSION

This review synthesized available evidence on the barriers nurses experienced while adopting health-promoting behaviours. Health-care institutions should target these factors when providing facilities and services to support nurses in adopting health-promoting behaviours. Policies should focus on workplace health promotion by advocating for healthy lifestyle policies. Future research should be conducted in more multicultural and geographically diverse regions to obtain a more global view of nurses' barriers to adopt health-promoting behaviours.

Rest-Activity Rhythm Is Associated With Obesity Phenotypes: A Cross-Sectional Analysis

BACKGROUND

The prevalence of obesity continues to increase in spite of substantial efforts towards its prevention, posing a major threat to health globally. Circadian disruption has been associated with a wide range of preclinical and clinical disorders, including obesity. However, whether rest-activity rhythm (RAR), an expression of the endogenous circadian rhythm, is associated with excess adiposity is poorly understood. Here we aimed to assess the association of RAR with general and abdominal obesity.

METHODS

Non-institutionalized adults aged ≥20 years participating in the US National Health and Nutrition Examination Survey (NHANES) 2011-2014 who wore accelerometers for at least four 24-hour periods were included (N=7,838). Amplitude, mesor, acrophase and pseudo-F statistic of RAR were estimated using extended cosinor model, and interdaily stability (IS) and intradaily variability (IV) were computed by nonparametric methods. We tested the association between rest-activity rhythm and general obesity defined by body mass index and abdominal obesity by waist circumference. Waist-to-height ratio, sagittal abdominal diameter, and total and trunk fat percentages measured by imaging methods were also analyzed.

RESULTS

In multivariable analysis, low amplitude (magnitude of the rhythm), mesor (rhythm-corrected average activity level), pseudo-F statistic (robustness of the rhythm), IS (day-to-day rhythm stability), or high IV (rhythm fragmentation) were independently associated with higher likelihood of general or abdominal obesity (all Ps<.05). Consistently, RAR metrics were similarly associated with all adiposity measures (all Ps<.01). Delayed phase of RAR (later acrophase) was only significantly related to general and abdominal obesity in women.

CONCLUSIONS

Aberrant RAR is independently associated with anthropometric and imaging measures of general and abdominal obesity. Longitudinal studies assessing whether RAR metrics can predict weight gain and incident obesity are warranted.

Association of Employees' Meal Skipping Patterns with Workplace Food Purchases, Dietary Quality, and Cardiometabolic Risk: A Secondary Analysis from the ChooseWell 365 Trial

BACKGROUND

Employed adults may skip meals due to time or financial constraints, challenging work schedules, or limited workplace food choices. Little is known about the relationship between employees' meal skipping patterns and workplace dietary choices and health.

OBJECTIVE

To examine whether hospital employees' meal skipping patterns were associated with workplace food purchases, dietary quality, and cardiometabolic risk factors (ie, obesity, hypertension, and prediabetes/diabetes).

DESIGN

This is a secondary cross-sectional analysis of baseline data from the ChooseWell 365 randomized controlled trial. Employees reported meal-skipping frequency in a baseline survey. The healthfulness of workplace food purchases was determined with a validated Healthy Purchasing Score (HPS) (range = 0 to 100 where higher scores = healthier purchases) calculated using sales data for participants' purchases in the 3 months before study enrollment. Dietary quality was measured with the 2015 Healthy Eating Index (range = 0 to 100 where higher score = healthier diet) from two 24-hour recalls. Cardiometabolic risk factors were ascertained from clinic measurements.

PARTICIPANTS/SETTING

Participants were 602 hospital employees who regularly visited workplace cafeterias and enrolled in ChooseWell 365, a workplace health promotion study in Boston, MA, during 2016-2018.

MAIN OUTCOME MEASURES

Primary outcomes were HPS, 2015 Healthy Eating Index, and cardiometabolic risk factors.

STATISTICAL ANALYSES

Regression analyses examined differences in HPS, 2015 Healthy Eating Index, and cardiometabolic variables by meal skipping frequency, adjusting for demographic characteristics.

RESULTS

Participants' mean (standard deviation) age was 43.6 (12.2) years and 478 (79%) were women. Overall, 45.8% skipped breakfast, 36.2% skipped lunch, and 24.9% skipped dinner ≥ 1 day/week. Employees who skipped breakfast ≥ 3 days/week (n = 102) had lower HPS (65.1 vs 70.4; P < 0.01) and 2015 Healthy Eating Index score (55.9 vs 62.8; P < 0.001) compared with those who never skipped. Skipping lunch ≥ 3 days/week and dinner ≥ 1 day/week were associated with significantly lower HPS compared with never skipping. Employees who worked nonstandard shifts skipped more meals than those who worked standard shifts. Meal skipping was not associated with obesity or other cardiometabolic variables.

CONCLUSIONS

Skipping meals was associated with less healthy food purchases at work, and skipping breakfast was associated with lower dietary quality. Future research to understand employees' reasons for skipping meals may inform how employers could support healthier dietary intake at work.

Effect of ethnicity, country of origin and workplace on health behaviors and health perception among nurses: Cross-sectional study

PURPOSE

The study aimed to (1) examine health behaviors and perceived health among nurses; (2) analyze the effect of nurses' personal and work characteristics on these variables; and (3) explore the relationship between health behaviors and nurses' health perception.

DESIGN AND METHODS

A cross-sectional study was conducted among nurses working in health care organizations (HCOs) across Israel. An email with the online questionnaire was sent to nurses working in 19 HCOs across Israel during September-December 2018.

FINDINGS

Of 18,120 nurses employed, 3542 completed the survey. Mean age was 44.8 years, 91% were female), 64.6% were hospital nurses and 52.8% were clinical staff nurses. Two-thirds of nurses did not achieve the physical activity (PA) target; the majority reported unfavorable eating habits; 66% slept less than 7 h at night and 15% smoke. Hospital nurses working night shifts reported the least favorable health behaviors. Non-Jewish nurses had less eating habits compared with Jewish nurses. Nurses born in the Former Soviet Union perceived their health as significantly worse than that of the other respondents. Binomial logistic regression demonstrated that, age, Israeli origin, achieving the PA target, having food breaks during work, consuming a Mediterranean diet, sleeping at least 7 h, undergoing screening tests as recommended, and not smoking predicted better health perception among nurses.

CONCLUSIONS

Nurses, particularly hospital-based, non-Jewish and immigrants from the Soviet Union, demonstrated unfavorable health behaviors that may negatively affect their wellbeing and health perception.

CLINICAL RELEVANCE

Interventions aimed at improving the health promoting mindset of nurses have the potential to improve their health and wellbeing and to enable them to become role models and health educators for patients and their families.

Start Healthy and Stay Healthy: A workplace health promotion intervention for new graduate nurses: A mixed-methods study

AIMS

This study explored the acceptability of a workplace health promotion intervention embedded into a transition to practice (TTP) programme to assist new graduate nurses in establishing healthy dietary and physical activity (PA) behaviours from career commencement.

DESIGN

A sequential mixed methods design.

METHODS

The Start Healthy and Stay Healthy (SH&SH) intervention, informed by the Behaviour Change Wheel, was conducted in an Australian Local Health District. It included face-to-face education sessions, the use of a fitness tracker and twice-weekly short answer messages. Participants completed three online surveys: at orientation, 6 weeks and 6 months. A sub-sample participated in semi-structured interviews to explore their experience of the intervention. Interview data were analysed thematically.

RESULTS

The intervention was delivered from February to December 2019. A total of 99 nurses completed the baseline survey, 62 at 6 weeks and 69 at 6 months. After 6 months, health knowledge increased as participants correctly identified recommended amounts of fruits, vegetables and PA. Fruit consumption increased at 6 months with little change to vegetable intake. Takeaway consumption decreased, but consumption of some discretionary foods increased. Across the three time points, there was a low engagement in PA during leisure time. The interviews identified three themes: (1) Support of Colleagues and Peers, (2) The Work Environment and (3) Engagement with SH&SH.

CONCLUSION

Providing a targeted intervention for new graduate nurses embedded into a TTP programme improved their health knowledge, some dietary behaviours, and participation in PA by some participants.

IMPACT

Ensuring a healthy nursing workforce is critical to retaining staff. Implementing a workplace health promotion intervention that targets new graduate nurses can help them adopt and maintain healthy lifestyle behaviours to support them in their future careers.

Metabolic health measurements of shift workers in a national cross-sectional study: Results from the Canadian Health Measures Survey

BACKGROUND

Shift work exposure may be a concern for a range of health effects, including metabolic health outcomes such as insulin resistance, high body weight, and abdominal obesity.

METHODS

We analyzed shift work and indicators of metabolic health (overweight/obesity defined by body mass index, self-reported changes in body mass index (BMI) in previous 1 and 10 years, waist circumference, waist-to-hip ratio, and insulin resistance assessed by the homeostasis model assessment 2 (HOMA-2-IR)) in the cross-sectional Canadian Health Measures Survey (CHMS). We analyzed descriptive characteristics of shift workers (regular night, evening, and rotating shift) and used multivariable linear regression to examine the association between two definitions of shift work exposure and measures of metabolic health, adjusted for age, sex, daily energy expenditure, sleep, and poor dietary quality.

RESULTS

5470 anthropometry (2637 fasting) participants in CHMS Cycles 1 and 2 were included, of whom 16.5% worked regular evening, night, or rotating shifts. Shift workers were younger and slept longer hours than non-shift workers. Bivariate associations showed inverse relationships between shift work and BMI, waist circumference, waist-to-hip ratio, and HOMA-2-IR. In adjusted analyses, BMI was inversely related to shift work, and other metabolic health outcomes showed no significant associations.

CONCLUSIONS

Healthy worker effects (including self-selection of exposure) could explain inverse relationships, particularly as the cross-sectional design only allowed assessment of current exposure. Key strengths include the population-based design and measurement of metabolic health indicators. Results underscore the importance of consideration of the health of shift workers following departure from the exposed population.

Shift work amongst older UK workers and job exit

BACKGROUND

Night/shift work may be increasing but there are few data about the prevalence amongst older workers. With governments encouraging people to work to older ages, it is important to know how feasible night/shift work is for them and whether there are any adverse health consequences.

AIMS

Amongst current older workers (aged 50-64 years), to explore the prevalence of night/shift working and evaluate its health impacts and sustainability over 4 years of follow-up.

METHODS

Data from the Health and Employment After Fifty cohort were used to describe the demographic, job and health characteristics of men and women undertaking night/shift work. Longitudinal data were used to examine the number and nature of exits annually thereafter.

RESULTS

Amongst the 5409 working at baseline, 32% reported night/shift work in sectors which differed by sex. Night/shift workers were more likely to be: current smokers; doing physically demanding work; struggling to cope at work; dissatisfied with their hours; depressed; sleeping poorly; rating their health poorly. Women whose job involves night work were more likely to exit the workforce over 4 years.

CONCLUSIONS

Almost one in three contemporary UK older workers report night/shift work. We found some evidence of adverse impacts on health, sleep and well-being and higher rates of job exit amongst women. More research is needed but night/shift work may be challenging to sustain for older workers and could have health consequences.

Barriers to healthy eating among nurses working in hospitals: A meta-synthesis

AIM

To explore the barriers to healthy eating among nurses working in hospitals.

DESIGN

Meta-synthesis.

DATA SOURCES

Published and unpublished papers were identified through electronic searches on PubMed, CINAHL, PsycINFO, Embase, Scopus, COCHRANE Library, Food Science and Technology Abstract, ProQuest Dissertations and Theses and OpenGrey from inception until 6 September 2020. English-language primary qualitative or mixed-method studies on barriers to healthy eating among hospital nurses were included. Mixed-method studies were eligible if their qualitative data were distinguishable. Studies on nursing assistants, enrolled nurses, nursing students, and patient-care assistants were excluded, as well as studies without full-texts, correlational studies, quantitative surveys, exploratory studies, conference abstracts and reviews.

METHODS

The studies were appraised using Critical Appraisal Skills Programme checklist. Qualitative data were extracted using Joanna Briggs Institute Qualitative Data Extraction Tool. Data synthesis followed two stages, meta-summary and meta-synthesis, proposed by Sandelowski & Barroso.

RESULTS

Twelve studies published from 2008 to 2020 involving 618 hospital nurses were included. The meta-summary generated 10 themes, which were meta-synthesized into three interrelated themes: personal barriers (e.g. nonchalance towards unhealthy eating), interprofessional and patient-related barriers (e.g. sharing unhealthy food), and organizational barriers (e.g. overwhelming work demands).

CONCLUSION

Insufficient self-control and self-confidence, nonchalance and negligence towards healthy eating and cultural beliefs that oppose the practice of healthy eating (personal barriers), exposure of unhealthy food practices in wards (interprofessional and patient-related barriers) and hospital cafeterias, overwhelming work exigencies and institutional constraints (organizational barriers) hindered nurses to achieve wholesome healthy eating.

IMPACT

Many hospital nurses' encountered challenges in healthy eating, thereby potentially jeopardizing their health and work performance. The findings emphasized the need of a joint effort by hospital nurses, families and colleagues, and hospital institutions to overcome the barriers to healthy eating faced by the hospital nurses.

The Health Behaviour of German Outpatient Caregivers in Relation to the COVID-19 Pandemic: A Mixed-Methods Study

The COVID-19 pandemic has affected outpatient caregivers in a particular way. While the German population becomes increasingly older, the number of people in need of care has also increased. The health and, thus, the health behaviour of employees in the outpatient care become relevant to maintain working capacity and performance in the long term. The aims of the study were (1) to examine the health behaviour and (2) to explore pandemic-related perceived change of health behaviour among outpatient caregivers during the COVID-19 pandemic. In a mixed-methods study, 15 problem-centred interviews and a web-based cross-sectional survey (N = 171) were conducted with outpatient caregivers working in Northern Germany. Interviewees reported partially poorer eating behaviour, higher coffee consumption, lower physical activity, skipping breaks more often and less sleep duration and quality during the pandemic. Some quantitative findings indicate the same tendencies. A majority of participants were smokers and reported higher stress perception due to the pandemic. Preventive behaviour, such as wearing PPE or hand hygiene, was increased among interviewees compared to the pre-pandemic period. Our findings indicate that the COVID-19 pandemic could negatively affect outpatient caregivers' health behaviour, e.g., eating/drinking behaviour and physical activity. Therefore, employers in outpatient care should develop workplace health promotion measures to support their employees in conducting more health-promoting behaviours during the COVID-19 pandemic.

Factors influencing initiation of health behaviour conversations with patients: Cross-sectional study of nurses, midwives, and healthcare support workers in Wales

Aim

To identify factors influencing healthcare professionals’ engagement in health behaviour conversations with patients.

Design

Cross‐sectional survey.

Methods

Between April and June 2019, an online survey of 1338 nurses, midwives and healthcare support workers was conducted. The survey assessed whether staff felt comfortable initiating health behaviour conversations with patients about five behaviours (reducing alcohol intake; stop smoking; being more active; reducing their weight; and improving their diet) and barriers to conversation initiation. Health professionals’ own health‐related behaviours, self‐rated health and mental wellbeing, and socio‐demographic characteristics were recorded. Logistic regression models were built to assess factors associated with feeling comfortable initiating health behaviour conversations for each topic.

Result

Less than 50% of respondents reported feeling comfortable initiating health behaviour conversations with patients. Female staff, young professionals (18 to 29 years), those in lower staff grades and those with poorer health and low mental wellbeing were less likely to report feeling comfortable having health behaviour conversations across all topics. Those who did not adhere to physical activity and dietary guidelines were less likely to initiate a conversation about being more active and having a healthy diet, respectively. Not having time to discuss the topic, suitable space to hold a conversation, and feeling worried about offending/upsetting patients were the main barriers reported.

Conclusion

Around 6 in 10 members of the nursing, midwifery and healthcare support workforce in Wales potentially do not feel comfortable to initiate a health behaviour conversation with patients about health and wellbeing. Feeling less comfortable to initiate a conversation was associated with staff demographics and organizational factors.

Impact

We identified those less likely to initiate health behaviour conversations as well as personal and organizational barriers to initiation. This will help to target and tailor interventions to ensure staff are equipped and enabled to hold health behaviour conversations with patients.

Mediterranean Diet Adherence and Eating Disorders in Spanish Nurses with Shift Patterns: A Cross-Sectional Study

Background and Objectives: Shift work has a significant influence on the mental health of workers. Nursing is characterised by a rotational work system. This study aimed to determine whether there was a link between adherence to the Mediterranean diet (MD) and the risk of suffering an eating disorder (ED) in nurses according to their work shift. Materials and Methods: A total of 240 women (nurses and nursing assistants) were evaluated and completed the PREDIMED-PLUS questionnaire on adherence to the MD and the EAT-26 (Eating Attitude Test, 26 items). Results: The results indicate that there are no differences in adherence to the MD depending on the work shift, being that adherence to the diet is already low. Statistically significant differences appear depending on the work shift in the following dimensions: restrictive behaviours and bulimia subscales (presenting higher scores in the 7-h rotating shift versus the fixed morning shift or 12-h rotating shift) and for total EAT-26 score. Conclusion: Whilst they do not condition adherence to a MD, the nursing shifts that are the most changing in terms of time patterns may condition restrictive behaviours and compensatory risk behaviours related to an ED.

The Health Behaviour of German Outpatient Caregivers in Relation to Their Working Conditions: A Qualitative Study

Ongoing demographic change is leading to an increasingly older society and a rising proportion of people in need of care in the German population. Therefore, the professional group of outpatient caregivers is highly relevant. Their work is characterised not only by interacting with patients in a mobile setting but also by working in shifts. Health behaviour under these specific working conditions is crucial for ensuring long-term work ability and performance. Little is known about the health behaviour of German outpatient caregivers and its potential impact on their work. The aims of the study were (1) to examine health behavioural patterns (nutrition, exercise, smoking, regeneration) of outpatient caregivers, (2) to illuminate their personal health-promoting behaviours, and (3) to identify potential work-related factors influencing their health behaviour. Fifteen problem-centred interviews were conducted with outpatient caregivers working in Northern Germany in the period January-April 2020. Interviews were analysed by using qualitative content analysis. Outpatient caregivers reported improvable nutrition and hydration, with simultaneous high coffee consumption, low physical activity, poor regeneration (breaks and sleep quality), and good personal health-promoting behaviour (e.g., back-friendly habits), although the majority were smokers. Barriers to the implementation of health-promoting behaviours were a high perception of stress due to increased workload and time pressure, while aids to better health-promoting behaviour were described as being social support and personal resources. The respondents perceived their working conditions as potentially influencing their health behaviour. On the basis of their descriptions, various practice-relevant strategies were derived. The data explore a potential need for outpatient care services to develop interventions on behavioural and structural levels that can help create healthier working conditions for their employees so these caregivers can adopt better health behaviours.

Promoting healthy eating in nurses

Across the world obesity rates in the general population have been increasing in recent years, a trend that has also been seen among nurses. Alongside the negative health effects of obesity such as type 2 diabetes mellitus and cardiovascular disease, the condition affects an individual's ability to work and results in increasing rates of absenteeism. However, the nature of nursing shift patterns and the healthcare workplace itself can influence a nurse's ability to eat healthily. This article discusses how obesity and healthy eating can affect the nursing role, as well as examining leadership and management practices that can support healthy eating in the workplace. The article is aimed at supporting nurse managers to reflect on their own lifestyle behaviour, which in turn will enable them to engage more with the topic of healthy eating among staff.

Mammalian circadian systems: Organization and modern life challenges

Humans and other mammalian species possess an endogenous circadian clock system that has evolved in adaptation to periodically reoccurring environmental changes and drives rhythmic biological functions, as well as behavioural outputs with an approximately 24-hour period. In mammals, body clocks are hierarchically organized, encompassing a so-called pacemaker clock in the hypothalamic suprachiasmatic nucleus (SCN), non-SCN brain and peripheral clocks, as well as cell-autonomous oscillators within virtually every cell type. A functional clock machinery on the molecular level, alignment among body clocks, as well as synchronization between endogenous circadian and exogenous environmental cycles has been shown to be crucial for our health and well-being. Yet, modern life constantly poses widespread challenges to our internal clocks, for example artificial lighting, shift work and trans-meridian travel, potentially leading to circadian disruption or misalignment and the emergence of associated diseases. For instance many of us experience a mismatch between sleep timing on work and free days (social jetlag) in our everyday lives without being aware of health consequences that may arise from such chronic circadian misalignment, Hence, this review provides an overview of the organization and molecular built-up of the mammalian circadian system, its interactions with the outside world, as well as pathologies arising from circadian disruption and misalignment.

Caffeine and high energy drink use and knowledge by nurses in three countries

AIM

The purpose of this study was to examine nurses' use and knowledge of caffeine and high energy drinks (HED) in three countries.

METHODS

Nurses in each country completed a survey on caffeine and HED use and knowledge.

RESULTS

In a sample of 182 nurses, caffeine use was high with 92% of nurses in Korea, 90.8% in Italy and 88.1% in the United States (US) having at least one cup of coffee a day while 64% of Koreans and 11.9% of those in the US had at least one HED per day. In Korea 68% of nurses (Italy 63.1% and 35.8% US) had at least one cup of caffeinated tea per day. Most agreed there is a need to educate nurses about HED, which contain high amounts of caffeine. Over half of nurses in Korea (58%) and the US (56.7%) said their colleagues consume HED at work.

CONCLUSION

Findings of this study indicate many nurses are consuming caffeine at work and there is a need for education. It is unclear how caffeine affects nurses' clinical performance, which raises the issue of patient safety. Further research is needed regarding safe amounts of caffeine while nurses are on the job as well as an understanding of how HED additives may affect the well-being and clinical care of nurses.

Factors associated with workplace fatigue among midwives in southern China: A multi-centre cross-sectional study

AIMS

To identify the level of workplace fatigue among midwives and factors influencing their fatigue.

BACKGROUND

Midwives who play an important role in medical care are prone to experience workplace fatigue, which negatively affects their well-being and work quality.

METHODS

A multi-centre cross-sectional study was conducted among 666 Chinese midwives from 38 hospitals in March 2019. Data were collected by four questionnaires of self-designed demographic questions, the Pittsburgh Sleep Quality Index, the Social Support Self-Rating Scale and the 14-item Fatigue Scale. Descriptive statistics, univariate analysis and multiple linear regression were used to analyse the data.

RESULTS

Midwives had moderate levels of fatigue with the mean scores of physical fatigue, mental fatigue and total fatigue being 9.53, 6.25 and 15.79, respectively. Multiple linear regression results showed that sleep quality, social support, job satisfaction, occupational injuries, adverse life events, frequency of irregular meals and employment type were statistically significant factors influencing fatigue among the participants.

CONCLUSIONS

Physical and mental fatigue were generally common among midwives and were affected by personal-related and work-related factors, sleep quality and social support.

IMPLICATIONS FOR NURSING MANAGEMENT

Nurse administrators have the opportunity to advocate for improved health policy under the two children rule to prevent workplace fatigue amongst midwives.

Shift work relationships with same- and subsequent-day empty calorie food and beverage consumption

Objectives Shift work may contribute to unhealthy eating behaviors. However, the evidence is built mainly on comparisons of eating behaviors between shift and non-shift workers. Growing research has suggested daily experiences and exposures may contribute to daily fluctuations in people's food consumption. The purpose of this study was to examine within-person associations between shift work and same- and subsequent-day empty calorie food/beverage consumption. Methods This was a 14-day intensive longitudinal study using ecological momentary assessment. A convenience sample of 80 hospital registered nurses working a rotating shift in Taiwan completed a 21-item food checklist assessing their empty food/beverage consumption (ie, fast/fried food, sweet and salty snacks, sugar-sweetened beverages) four times at random daily. Daily shift work (ie, day, evening, or night shift) was derived from the registry-based work schedule. Three-level mixed-effects regression models were employed for hypothesis testing. Results A total of 77 participants with 2444 momentary assessments were included in the final analysis. The results suggested that participants on night compared to day shifts had higher likelihoods of fast/fried food intake [adjusted odds ratio (OR _adj) 1.7, 95% CI 1.2-2.6] and sugar-sweetened beverage consumption (OR _adj1.5, 95% CI 1.0-2.1). However, there were no significant associations between shift work and subsequent-day empty calorie food/beverage consumption. Conclusions Night shift work is associated with same-day increased empty calorie food/beverage consumption among workers. Strategies that help to prevent unhealthy eating behaviors on night shifts may help to reduce rotating shift workers' empty calorie food/beverage consumption and ultimately improve their health.

Fundamental Concepts of Human Thermoregulation and Adaptation to Heat: A Review in the Context of Global Warming

The international community has recognized global warming as an impending catastrophe that poses significant threat to life on earth. In response, the signatories of the Paris Agreement (2015) have committed to limit the increase in global mean temperature to < 1.5 °C from pre-industry period, which is defined as 1950-1890. Considering that the protection of human life is a central focus in the Paris Agreement, the naturally endowed properties of the human body to protect itself from environmental extremes should form the core of an integrated and multifaceted solution against global warming. Scholars believe that heat and thermoregulation played important roles in the evolution of life and continue to be a central mechanism that allows humans to explore, labor and live in extreme conditions. However, the international effort against global warming has focused primarily on protecting the environment and on the reduction of greenhouse gases by changing human behavior, industrial practices and government policies, with limited consideration given to the nature and design of the human thermoregulatory system. Global warming is projected to challenge the limits of human thermoregulation, which can be enhanced by complementing innate human thermo-plasticity with the appropriate behavioral changes and technological innovations. Therefore, the primary aim of this review is to discuss the fundamental concepts and physiology of human thermoregulation as the underlying bases for human adaptation to global warming. Potential strategies to extend human tolerance against environmental heat through behavioral adaptations and technological innovations will also be discussed. An important behavioral adaptation postulated by this review is that sleep/wake cycles would gravitate towards a sub-nocturnal pattern, especially for outdoor activities, to avoid the heat in the day. Technologically, the current concept of air conditioning the space in the room would likely steer towards the concept of targeted body surface cooling. The current review was conducted using materials that were derived from PubMed search engine and the personal library of the author. The PubMed search was conducted using combinations of keywords that are related to the theme and topics in the respective sections of the review. The final set of articles selected were considered "state of the art," based on their contributions to the strength of scientific evidence and novelty in the domain knowledge on human thermoregulation and global warming.

What influences the "when" of eating and sleeping?A qualitative interview study

Timing of eating relative to sleep and endogenous circadian rhythm impacts weight and cardiometabolic health. We used qualitative methods to explore what influences the "when" of eating and sleeping. We conducted 37 one-on-one semi-structured interviews among participants with a body mass index (BMI) ≥ 25 kg/m² recruited from three internal medicine clinics affiliated with an urban academic hospital. Participants (70.3% Female; 51.4% White; Age range: 21-83 years old) completed measures of social jetlag, physical activity, eating habits, and mobile application use and participated in interviews following a guide developed by the study team. Responses were recorded, transcribed and coded sequentially by two trained researchers using editing-style analysis to identify themes. We identified two main themes, each with subthemes: 1) influences on the "when" of eating and sleeping, with subthemes including social jetlag and being overscheduled, and 2) contextualizing beliefs and perceptions about the "when" of eating and sleeping, with subthemes including perceived recommendations for timing of eating and sleeping, and alignment of behaviors with perceived recommendations. Many participants noted being more flexible in their eating and sleeping times on work-free vs work days. The themes this study identified should be considered when designing interventions that influence the timing of eating and sleeping for weight management.

Effect of consuming a late-night high-protein/moderate-carbohydrate vs. low-protein/high-carbohydrate meal by night workers on their food perceptions later during the day: a randomized crossover study

It is typical of night workers to consume a large dinner meal before their work shift, even though this practice may increase the risk for metabolic disorders. Night workers usually eat at night to socialize with colleagues as well as to stay alert and to avoid upset stomach during the night shift. However, little is known if and how the composition of the nighttime meal by night shift workers influences their food perceptions and eating behavior later during the day. The aim of this study was to analyze the effect of a high-protein/moderate-carbohydrate (HP/MCHO) meal vs. low-protein/high-carbohydrate (LP/HCHO) meal eaten at night by night-shift workers on their food consumption and perceptions later during the day. Fourteen male night shift workers were followed-up for 7 days for their eating and sleep habits. Then, participants underwent two isocaloric dietary events - one event a HP/MCHO meal containing 45% carbohydrate, 35% protein, and 20% fat and the other event a LP/HCHO meal containing 65% carbohydrate, 15% protein, and 20% fat, with a 6-day washout period between them - at 01:00 h during their night shift. Thereafter throughout the day, participants filled a food register of all the food consumed and perceptions, including hunger before meals, enjoyment of meals, and satiety. Generalized estimating equation analyses were used to examine the effect of both conditions on food consumption and food perceptions. Appetite for salty food snacks was greater after the HP/MCHO condition than after the LP/HCHO condition (p = .041). During the day following consumption of the nighttime HP/MCHO vs. LP/HCHO meal, there was higher percentage of carbohydrate consumption during lunch and a lower percentage of fat consumption during dinner (48.14% vs. 36.98% and 27.34% vs. 40.39%, respectively). These findings suggest the composition in terms of carbohydrates, protein, and fats of the meal consumed for the night shift by night workers may affect later during the day both food consumption and perceptions.

Promoting and supporting healthy eating among nurses

Maintaining a healthy diet is important for health and longevity. Many diets are recommended for their health-promotion properties. Despite their role in providing health education to patients, nurses do not always maintain healthy diets themselves. The literature shows that a significant number of nurses are overweight or obese. This article reviews the recommended healthy eating guidance and explores why nurses may not always eat healthily. It appears that several characteristics of the nursing role and workplace - notably shift work, fatigue, stress, and suboptimal facilities and availability of healthy foods - make it increasingly challenging for nurses to maintain healthy diets. The article also discusses strategies employers can use to adapt the work environment to support healthy eating.

Consequences of Circadian Disruption in Shift Workers on Chrononutrition and their Psychosocial Well-Being

The workers and employees in various institutions are subjected to different shifts and work schedules. The employees work not only at daytime but also during odd hours at night. The biological clock of an individual is often altered during night shifts. This affects the psychosocial well-being and circadian nutritional intake of the worker. Disturbance in circadian rhythm results in the development of metabolic disorders such as hypertension, dyslipidemia, dysglycemia, and abdominal obesity. In the present review, we discuss the nature of shift work, sleep/wake cycle of an individual, chrononutrition, dietary habits, and meal changes with regard to timing and frequency, related to shift work. We also discuss the relationship between nutritional intake and psychosocial well-being among shift workers. The review may be beneficial for prevention of metabolic disorders and maintaining sound psychological condition in shift workers.

Eating Behavior (Duration, Content, and Timing) Among Workers Living under Different Levels of Urbanization

Urbanization has contributed to extended wakefulness, which may in turn be associated with eating over a longer period. Here, we present a field study conducted in four groups with different work hours and places of living in order to investigate eating behavior (duration, content, and timing). Anthropometric measures were taken from the participants (rural (n = 22); town (n = 19); city-day workers (n = 11); city-night workers (n = 14)). In addition, a sociodemographic questionnaire was self-answered and 24-h food recalls were applied for three days. The 24-h food recalls revealed that fat intake varied according to the groups, with the highest consumption by the city-day workers. By contrast, city-day workers had the lowest intake of carbohydrate, whereas the rural group had the highest. In general, all groups had some degree of inadequacy in food consumption. Eating duration was negatively correlated with total energy intake, fat, and protein consumption in the rural and town groups. There was a positive correlation between body mass index and eating duration in both city groups. The rural group had the earliest start time of eating, and this was associated with a lower body mass index. This study suggested that food content and timing, as well as eating duration, differed according to place of living, which in turn may be linked to lifestyle.

Association Between Sugar-Sweetened Beverage Consumption as Meal Substitutes, Workload, and Obesity in Nurses: A Cross-Sectional Study

Background: High occupational stress has been associated with altered eating behaviors and obesity. Occupational stress is reported to be high in Asian countries. Furthermore, many Asian countries are increasingly consuming Western-type foods (e.g., incorporating drinks with meals) which collectively may also be contributing to obesity. Therefore, the aim of this study was to examine (a) associations between sugar-sweetened beverage (SSB) consumption as meal replacement and obesity and (b) associations between workload and substituting meals with SSB in nurses. Methods: A representative sample of 854 hospital-based nurses completed a structured questionnaire about SSB consumption, workload, and body mass index (BMI). Log binomial regression models were employed to test associations between SSBs and obesity rates and associations between workload and SSBs. Results: Most participants (57.6%) consumed SSBs as meal replacements during work. This was related to high workloads during shifts. Substituting SSBs for meals was significantly associated with increased likelihood of obesity (aPRR = 1.4, 95% CI (1.1, 1.7)). Workload was positively associated with SSB intake as meal substitutes (aPRR = 1.4, 95% CI (1.2, 1.6)). Conclusions: Our findings show that SSBs are used as meal substitutes and is due to the workload demands. Sugar-sweetened beverage consumption is also positively associated with the increased likelihood of obesity. Interventions that modify workloads and decrease SSB consumption may improve workers’ eating behaviors and health.