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Effects of night duty events on blood pressure and autonomic modulation in physicians
Background: The dynamic effects of duty events on the blood pressure (BP) and heart rate variability (HRV) of physicians on duty are unknown. Methods: A study was conducted among 12 physicians on night duty. BP and HRV with and without the effect of a duty event were compared. The risk of higher BP and impaired HRV after a phone call were calculated. Results: Physicians had higher mean BP (122.4 ± 11.1; 76.9 ± 7.1 mmHg) within 30 min after a phone calls than without a phone call (113.5 ± 5.3; 69.0 ± 3...
Association of changes in work shifts and shift intensity with change in fatigue and disturbed sleep: a within-subject study
Objectives: The aim of this study was to examine whether changes in work shifts and shift intensity are related to changes in difficulties to fall asleep, fatigue, and sleep length. Methods: Questionnaire responses of hospital employees (N=7727, 93% women) in 2008, 2012, 2014 and 2015 were linked to daily-based records of working hours during three months preceding each survey. We used conditional logistic regression and longitudinal fixed-effects analyses to investigate odds ratios (OR) and 95% confidence intervals (CI) for each 25% within-individual change in the proportion of working hour characteristics...
Risk of injury after evening and night work
Findings from the Danish Working Hour Database Objectives: Evening and night work have been associated with higher risk of injury than day work. However, previous findings may be affected by recall bias and unmeasured confounding from differences between day, evening and night workers. This study investigates whether evening and night work during the past week increases risk of injury when reducing recall bias and unmeasured confounding. Methods: We linked daily working hours at the individual level of 69 200 employees (167 726 person years from 2008–2015), primarily working at hospitals...
Long working hours and depressive symptoms
Systematic review and meta-analysis of published studies and unpublished individual participant data Objectives: This systematic review and meta-analysis combined published study-level data and unpublished individual-participant data with the aim of quantifying the relation between long working hours and the onset of depressive symptoms. Methods: We searched PubMed and Embase for published prospective cohort studies and included available cohorts with unpublished individual-participant data. We used a random-effects meta-analysis to calculate summary estimates across studies. Results: We identified...
949 Shiftwork and breast cancer: epidemiology, burden, and implications for prevention
Introduction: Approximately one in five workers globally work night, evening, or rotating shifts. Shiftwork involving circadian disruption is a probable carcinogen for breast cancer. Our objective was to synthesise the current state of the epidemiological literature, report on shiftwork-associated breast cancer burden in Canada, and discuss implications for prevention. Methods: A search was conducted for meta-analyses accompanied by a systematic review, published from 2010–2017, that included at least one meta-risk estimate (mRE) for breast cancer associated with any permanent/rotating night...
Fly-in/fly-out et santé psychologique au travail dans les mines
Une recension des écrits La fatigue, associée aux longues heures de travail, aux courtes périodes de récupération entre les quarts de travail et à la qualité des installations d'hébergement, est considérée comme un des principaux enjeux en matière de santé et de sécurité au travail par les travailleurs miniers FIFO. Dans une étude, 70 % des travailleurs miniers FIFO interrogés déclarent vivre des troubles de sommeil. Selon une autre étude, 45 % des travailleurs miniers...
Impacts potentiels du télétravail sur les comportements en transport, la santé et les heures travaillées au Québec
Ce rapport de recherche utilise les données de l'Enquête sociale générale (ESG) de Statistique Canada menée en 2010 afin d'établir une caractérisation statistique des télétravailleurs québécois et d'estimer certains des impacts potentiels du télétravail sur les comportements relatifs aux déplacements, la santé et les heures travaillées. Nous présentons d'abord le contexte ayant mené à la croissance du télétravail, des estimations de la...
A review of the impact of shift work on occupational cancer
The change to a 24-hour society means that increasingly more people are working ‘non-traditional' hours, including shift work and night work. However there remains concern over the effect of shift work on health, including its relationship with cancer. This research, undertaken by the Institute of Occupational Medicine, aimed to review the literature on the impact of shift working on the risk of cancer and the steps that could be taken to reduce the risks, to help build an international perspective of the problem. Source: https://www.iosh.co.uk/Books-and-resources/A-review-of-the-impact...
Night-shift work and hematological cancers
A population based case-control study in three Nordic countries Objective: The aim of this case–control study was to assess the effect of night-shift work on the risk of hematological cancers. Methods: The study included 39 371 leukemia, 56 713 non-Hodgkin lymphoma, 9322 Hodgkin lymphoma, and 26 188 multiple myeloma cases diagnosed between 1961 and 2005 in Finland, Sweden, and Iceland. Five controls for each case were selected from the Nordic Occupational Cancer Study (NOCCA) cohort, matched by year of birth, sex and country. Night-shift exposure was assessed by using the NOCCA job-exposure...
Night Shift Work Increases the Risks of Multiple Primary Cancers in Women
A Systematic Review and Meta-analysis of 61 Articles A growing number of studies have examined associations between night shift work and the risks of common cancers among women, with varying conclusions. We did a meta-analysis to identify whether long-term night shift work increased the risks of common cancers in women. We enrolled 61 articles involving 114,628 cases and 3,909,152 participants from Europe, North America, Asia, and Australia. Risk estimates were performed with a random-effect model or a fixed-effect model. Subgroup analyses and meta-regression analyses about breast cancer were conducted...
Comprendre l’influence de la régulation des contraintes temporelles sur l’appropriation des principes généraux de déplacement sécuritaire des bénéficiaires par les recrues préposés aux bénéficiaires
Les préposés aux bénéficiaires (PAB) ont comme mandat de réaliser l'ensemble des activités d'assistance envers les résidents des centres d'hébergement et de soins de longue durée (CHSLD) au Québec. Ils exercent une fonction indispensable dans les CHSLD, alors que le vieillissement de la population s'accentue, que les problématiques physiques et cognitives des résidents s'aggravent et que la réponse à leurs besoins se complexifie. Les PAB forment également une catégorie...
Shift work schedule and night work load: Effects on body mass index
A four-year longitudinal study Objectives: The aim of this study was to investigate changes in body mass index (BMI) between different work schedules and different average number of yearly night shifts over a four-year follow-up period. Methods: A prospective study of Norwegian nurses (N=2965) with different work schedules was conducted: day only, two-shift rotation (day and evening shifts), three-shift rotation (day, evening and night shifts), night only, those who changed towards night shifts, and those who changed away from schedules containing night shifts. Paired student's t-tests were...
Night Shift Work Increases the Risks of Multiple Primary Cancers in Women
A Systematic Review and Meta-analysis of 61 Articles A growing number of studies have examined associations between night shift work and the risks of common cancers among women, with varying conclusions. We did a meta-analysis to identify whether long-term night shift work increased the risks of common cancers in women. We enrolled 61 articles involving 114,628 cases and 3,909,152 participants from Europe, North America, Asia, and Australia. Risk estimates were performed with a random-effect model or a fixed-effect model. Subgroup analyses and meta-regression analyses about breast cancer were conducted...
Quelles sont les évolutions récentes des conditions de travail et des risques psychosociaux?
Les premiers résultats de la dernière enquête « Conditions de travail » conduite en 2016 font état d'une stabilisation des contraintes de rythme de travail et d'une baisse de certaines contraintes psychosociales (charge mentale en diminution, horaires moins contraignants, soutien social fort et stabilisation de la demande émotionnelle) qui s'accompagnent d'un recul des comportements hostiles. En revanche l'autonomie des salariés poursuit son recul. Les contraintes physiques sont globalement stabilisées à un niveau...
Shift work and the risk of cardiovascular disease
A systematic review and meta-analysis including dose–response Relationship Objectives: The aim of this review was to assess the risk of cardiovascular disease (CVD) events associated with shift work and determine if there is a dose–response relationship in this association. Method: Electronic databases (PubMed, Scopus, and Web of Science) were searched for cohort or case–control control study designs in any population, reporting exposure to shift work as the main contributing factor to estimate CVD risk. For each study, adjusted relative risk (RR) ratios and 95% confidence intervals...
A review of the impact of shift-work on cancer
Summary of the evidence for practitioners Shift work that involves disruption to the body's circadian rhythm is classified as probably carcinogenic to humans based on limited evidence in humans and sufficient evidence in experimental animals. This article draws together the available information from the epidemiological, mechanistic and health and safety practice research to provide advice for practitioners. There is evidence that the increase in breast cancer risk amongst women who have worked night shifts is relatively modest and we cannot exclude the possibility that there is no cancer risk...
Shiftwork and the Retinal Vasculature Diameters Among Police Officers
Objective: To investigate associations of central retinal arteriolar equivalent (CRAE), a measure of retinal arteriolar width, and central retinal venular equivalents (CRVE), a measure of retinal venular width, with shiftwork in 199 police officers (72.9% men). Methods: Shiftwork (day, afternoon, night) was assessed using electronic payroll records. Four digital retinal images per officer were taken. Mean diameters of the retinal vasculature were compared across shifts using analysis of variance (ANOVA)/analysis of covariance (ANCOVA). Results: Among all officers (mean age = 46.6 ± 6.8 years...
Dimensions sociales et psychologiques associées aux activités minières et impacts sur la qualité de vie
L'intérêt de l'industrie et du gouvernement pour la mise en valeur des ressources minérales du territoire québécois, particulièrement sur le territoire visé par le Plan Nord, convie les acteurs de la santé publique à étudier les activités qui y sont associées et leurs répercussions sanitaires. Afin de répondre au besoin du réseau de la santé publique de mieux comprendre les répercussions sanitaires associées aux activités minières, une revue de littérature...
Night Shift Work and Its Health Effects on Nurses
The purpose of this research was to study night shift work and its health effects on nurses. This was a quantitative study using descriptive design; it also incorporated three qualitative open-ended questions to complement the study. The data were collected using Survey Monkey, with an Internet-based confidential data collection tool. The population of relevance to this study was nurses employed in hospital settings in the United States. E-mail addresses and Facebook were used to recruit participants. Results indicated that there is an increased risk of sleep deprivation, family stressors, and...
Have mobile devices changed working patterns in the 21st century?
A time-diary analysis of work extension in the UK It is commonly claimed that ubiquitous connectivity erodes the boundaries that once separated work from other aspects of life. Mobile devices in particular enable people to perform work-related activities anytime anywhere. Surprisingly, however, we know little about how people nationwide organise their daily working time over a period that has witnessed rapid technological change. Using the United Kingdom Time Use Surveys 2000 and 2015, covering this period of technological change, we studied work extension practices, and the links between work...
Are professional drivers less sleepy than non-professional drivers?
Objective: It is generally believed that professional drivers can manage quite severe fatigue before routine driving performance is affected. In addition, there are results indicating that professional drivers can adapt to prolonged night shifts and may be able to learn to drive without decreased performance under high levels of sleepiness. However, very little research has been conducted to compare professionals and non-professionals when controlling for time driven and time of day. Method: The aim of this study was to use a driving simulator to investigate whether professional drivers are more...
Personal light-at-night exposures and components of variability in two common shift work industries
Uses and implications for future research Objectives: Shift workers’ increased risk of various adverse health outcomes has been linked to light-at-night (LAN) exposure, but few studies have measured LAN exposure in workplaces. To inform future research methods, this study aimed to (i) measure shift workers’ exposures to LAN across industries, occupations, and work environments and (ii) assess components of variance across different exposure groupings and metrics. Methods: Between October 2015 and March 2016, 152 personal full-shift measurements were collected from 102 night shift workers...
Working time patterns for sustainable work
Working time is a recurrent topic of study because the nature of work, its content, the conditions under which it is performed and the labour market itself keep changing. This report provides an overview of the recent evolution of working time duration and organisation in the EU and highlights the most important trends and differences between Member States. Through an in-depth analysis of data from the sixth European Working Conditions Survey carried out in 2015, it examines – from a gender and life course perspective – the links between working time patterns, work–life balance...
Night work, long work weeks, and risk of accidental injuries
A register-based study Danish employees with night work had a higher ratio of accidental injuries compared to day workers. Awareness should be raised in order to prevent injuries in the future. No association between weekly working hours and accidental injuries were found. Thus it appears that the current regulation ensures that long weekly working hours does not imply an increased risk of injuries. Source: Larsen, A. D., Hannerz, H., Møller, S. V., Dyreborg, J., Bonde, J. P., Hansen, J., ... & Garde, A. H. (2017). Scandinavian Journal of Work, Environment & Health . http://dx.doi...
Shift work and the incidence of prostate cancer
A 10-year follow-up of a German population-based cohort study Objectives: We investigated the association of shift and night work with the incidence of prostate cancer using data of the population-based prospective Heinz Nixdorf Recall Study from the highly industrialized Ruhr area in Germany. Methods: Participants of the baseline survey were recruited between 2000–2003. A follow-up survey including, a detailed interview on shift and night work, was conducted from 2011–2014. We included 1757 men who did not report a history of prostate cancer at baseline. We assessed shift- and night...
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