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night shift worker

Maxine P Bonham, Gloria K W Leung, Rochelle Davis, Tracey L Sletten, Chiara Murgia, Morag J Young, Nina Eikelis, Elisabeth A Lambert, Catherine E Huggins
INTRODUCTION: Shift work is an independent risk factor for cardiovascular disease (CVD). Shift workers who are awake overnight and sleep during the day are misaligned with their body's endogenous circadian rhythm. Eating at night contributes to this increased risk of CVD by forcing the body to actively break down and process nutrients at night. This pilot study aims to determine whether altering meal timing overnight, in a shift working population, will impact favourably on modifiable risk factors for CVD (postprandial bplasma lipids and glucose concentration)...
March 14, 2018: BMJ Open
Philip Cheng, Gabriel Tallent, Helen J Burgess, Kieulinh Michelle Tran, Thomas Roth, Christopher L Drake
STUDY OBJECTIVES: Recent evidence indicates that daytime sleep disturbance associated with night shift work may arise from both circadian misalignment and sleep reactivity to stress. This presents an important clinical challenge because there are limited means of predicting and distinguishing between the two mechanisms, and the respective treatments differ categorically; however, there is support that a polymorphism in the PERIOD3 gene ( PER3 ) may indicate differences in vulnerability to daytime sleep disturbance in shift workers...
February 27, 2018: Journal of Clinical Sleep Medicine: JCSM: Official Publication of the American Academy of Sleep Medicine
Hogne Vikanes Buchvold, Ståle Pallesen, Siri Waage, Bjørn Bjorvatn
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...
January 7, 2018: Scandinavian Journal of Work, Environment & Health
John M Violanti, Sherry L Owens, Desta Fekedulegn, Claudia C Ma, Luenda E Charles, Michael E Andrew
The present study examined the association between shift work and fatigue among male ( n = 230) and female ( n = 78) police officers. A 15-year work history database was used to define dominant shifts as day, afternoon, or night. A 10-item questionnaire created from the Standard Shiftwork Index (SSI) assessed fatigue. Gender-stratified analyses of variance and covariance and Poisson regression were used to compare means and prevalence of individual items across shifts. No significant differences in total fatigue scores were observed across shifts...
February 1, 2018: Workplace Health & Safety
Hiroki Yoshioka, Tsunemasa Nonogaki, Yasuro Shinohara, Masumi Suzui, Yurie Mori, Gi-Wook Hwang, Katsumi Ohtani, Nobuhiko Miura
The aim of the present study is to investigate the "chronotoxicity" of seven metal compounds (Hg, Pb, Ni, Cr, Cu, Zn, or Fe) by assessing how their toxicity varies with circadian periodicity. Male ICR mice were injected with each metal compound intraperitoneally at 6 different time points over the course of a day (zeitgeber time [ZT]: ZT2, ZT6, ZT10, ZT14, ZT18 and ZT22). Mortality was then monitored until 14 days after the injection. Our investigation demonstrated that mice were tolerant against Ni toxicity during dark phase, on the other hand, they were tolerant against Cr toxicity during light phase...
2018: Journal of Toxicological Sciences
Isabel Aguilar-Palacio, Sara Malo, Cristina Feja, MªJesús Lallana, Montserrat León-Latre, José Antonio Casasnovas, MªJosé Rabanaque, Eliseo Guallar
Benefits of cardiovascular disease (CVD) risk factors control are well known, but goals achievement remains low. The objective of this study is to evaluate the prevalence of CVD risk factors among men ina worker's cohort with no previous CVD, to study control variations across time and the factors associated with poor control. To this end, we conducted a cohort reexamination (2010-2014) within the context of the Aragon Workers Health Study (AWHS). Data from working characteristics, analytical values and pharmacological prescription were included in the analysis...
2018: PloS One
Emilie Cordina-Duverger, Florence Menegaux, Alexandru Popa, Sylvia Rabstein, Volker Harth, Beate Pesch, Thomas Brüning, Lin Fritschi, Deborah C Glass, Jane S Heyworth, Thomas C Erren, Gemma Castaño-Vinyals, Kyriaki Papantoniou, Ana Espinosa, Manolis Kogevinas, Anne Grundy, John J Spinelli, Kristan J Aronson, Pascal Guénel
Night shift work has been suspected to increase breast cancer risk but epidemiological studies have been inconsistent due to heterogeneous assessment of exposure to night work. To overcome this limitation, we pooled data of five population-based case-control studies from Australia, Canada, France, Germany, and Spain into a single harmonized dataset using a common definition of night work including 6093 breast cancer cases and 6933 population controls. The odds ratio for breast cancer in women who ever worked at night for at least 3 h between midnight and 5 a...
February 20, 2018: European Journal of Epidemiology
Hye-Eun Lee, Jongin Lee, Tae-Won Jang, In-Ah Kim, Jungsun Park, Jaechul Song
Background: Since the International Agency for Research on Cancer classified shift work that involves circadian disruption as "probably carcinogenic to humans," there has been growing concern on the relationship between night work and breast cancer. In Korea, about 10-15% of workers are engaged in night-shift work, and breast cancer is one of the most common cancers in women. The purpose of this study was to review epidemiologic evidence on the relationship between night work and breast cancer...
2018: Annals of Occupational and Environmental Medicine
Sarah L Chellappa, Christopher J Morris, Frank A J L Scheer
Shift work increases the risk for human errors, such that drowsiness due to shift work has contributed to major industrial disasters, including Space Shuttle Challenger, Chernobyl and Alaska Oil Spill disasters, with extraordinary socio-economical costs. Overnight operations pose a challenge because our circadian biology inhibits cognitive performance at night. Yet how the circadian system modulates cognition over multiple days under realistic shift work conditions remains to be established. Importantly, because task-specific cognitive brain regions show different 24-h circadian dynamics, we hypothesize that circadian misalignment impacts cognition task-dependently...
February 14, 2018: Scientific Reports
Siri Waage, Ståle Pallesen, Bente Elisabeth Moen, Bjørn Bjorvatn
Insomnia and excessive sleepiness are among the most commonly reported sleep problems related to shift work. Sleep-related movement disorders have, however, received far less attention in relation to such work schedules. The objective of this study was to investigate the association between different shift work schedules and the prevalence of Restless legs syndrome/Willis-Ekbom disease (RLS/WED) in a large sample of Norwegian nurses. Our hypothesis was that shift working nurses would report higher prevalence of RLS/WED compared to day workers...
2018: Frontiers in Neurology
Gerben Hulsegge, Nidhi Gupta, Karin I Proper, Natasja van Lobenstein, Wilhelmina IJzelenberg, David M Hallman, Andreas Holtermann, Allard J van der Beek
BACKGROUND: Imbalance in the autonomic nervous system due to a disrupted circadian rhythm may be a cause of shift work-related cardiovascular diseases. OBJECTIVE: We aimed to determine the association between shift work and cardiac autonomic activity in blue-collar workers. METHODS: The study included 665 blue-collar workers aged 18-68 years in different occupations from two Danish cohort studies. Time and frequency domain parameters of heart rate variability (HRV) were measured during sleep using the Actiheart monitor, and used as markers of cardiac autonomic function...
February 9, 2018: International Journal of Cardiology
Selene Verde-Tinoco, Rafael Santana-Miranda, Romel Gutiérrez-Escobar, Reyes Haro, Joana Miranda-Ortiz, Talia Berruga-Fernandez, Ulises Jimenez-Correa, Adrián Poblano
Introduction: Reduced sleep to increase work hours is common among police officers, when this situation is combined with Obstructive sleep apnea/hypopnea syndrome (OSAHS), health consequences are greater, therefore we believe there is a need of research for these alterations. The aim of this study was to measure the changes in sleep architecture (SA) in police officers who currently have Night shift work (NSW) and OSAHS. Methods: We compared SA in 107 subjects divided in three groups: the first group included police officers with NSW and severe OSAHS (n = 48); the second group were non-police officers with diurnal work time and severe OSAHS (n = 48) and the third group was formed by healthy controls (n = 11)...
October 2017: Sleep Science
Bette Loef, Allard J van der Beek, Andreas Holtermann, Gerben Hulsegge, Debbie van Baarle, Karin I Proper
Objectives Shift work may alter workers' leisure-time and occupational physical activity (PA) levels, which might be one of the potential underlying mechanisms of the negative health effects of shift work. Therefore, we compared objectively measured PA levels between hospital shift and non-shift workers. Methods Data were used from Klokwerk+, a cohort study examining the health effects of shift work among healthcare workers employed in hospitals. In total, 401 shift workers and 78 non-shift workers were included, all of whom wore Actigraph GT3X accelerometers for up to seven days...
January 22, 2018: Scandinavian Journal of Work, Environment & Health
Megan R Winkler, Susan Mason, Melissa N Laska, Mary J Christoph, Dianne Neumark-Sztainer
The last century has seen dramatic shifts in population work circumstances, leading to an increasing normalization of non-standard work schedules (NSWSs), defined as non-daytime, irregular hours. An ever-growing body of evidence links NSWSs to a host of non-communicable chronic conditions; yet, these associations primarily concentrate on the physiologic mechanisms created by circadian disruption and insufficient sleep. While important, not all NSWSs create such chronobiologic disruption, and other aspects of working time and synchronization could be important to the relationships between work schedules and chronic disease...
April 2018: SSM—Population Health
Anjana Verma, Jugal Kishore, Shobha Gusain
Background: Shift work can have an impact on the physical and psychological well-being of the healthcare worker, affecting patients as well as their own safety at the workplace. This study was conducted to compare the health outcomes and injuries, along with associated risk factors between the nurses working in rotating night shift (RNS) as compared to day shift (DS) only. Materials and Methods: It was a cross-sectional study conducted from June to November 2016 in a tertiary care hospital of Delhi...
January 2018: Iranian Journal of Nursing and Midwifery Research
Madar Talibov, Eero Pukkala, Jan Ivar Martinsen, Laufey Tryggvadottir, Elisabete Weiderpass, Johnni Hansen
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 matrix (JEM)...
January 11, 2018: Scandinavian Journal of Work, Environment & Health
Takahiro Yoshizaki, Taiki Komatsu, Yuki Tada, Azumi Hida, Yukari Kawano, Fumiharu Togo
Rotating shift workers are associated with imbalanced dietary intakes. Rotating shift workers and dietary intakes in adults who do not engage in night work have also been shown to be associated with chronotype. However, no studies have examined associations between morningness-eveningness (i.e., the degree to which people prefer to be active in the morning or the evening), rotating shift work and dietary intakes. Therefore, our first purpose was to elucidate the association between morningness-eveningness and habitual food group intakes in rotating shift workers...
January 4, 2018: Chronobiology International
Magdalena Kwiatosz-Muc, Anna Fijałkowska-Nestorowicz, Magdalena Fijałkowska, Anna Aftyka, Michał Kowalczyk
BACKGROUND: High stress levels have been commonly reported among ICU workers. Currently, anaesthesiology is safer for the patient but more stressful for the staff working in this branch of medicine. ICU and anaesthesiology personnel are prone to stress because of the specific character of their work. OBJECTIVES: Our objectives were to assess stress prevalence among anaesthesiology and ICU workers to compare this stress prevalence in relation to professional groups, sex, job seniority, and type of hospital and describe the importance of major stressors at work...
December 13, 2017: Australian Critical Care: Official Journal of the Confederation of Australian Critical Care Nurses
Gloria K W Leung, Catherine E Huggins, Maxine P Bonham
BACKGROUND & AIMS: Glucose metabolism is, in part, regulated by the circadian rhythm. Postprandial glucose response is exaggerated and insulin sensitivity is reduced at night compared with the morning. Sustained poor glucose tolerance may be related to the increased risk of type-2 diabetes mellitus and cardiovascular disease experienced by shift workers. Manipulation of meal type may be able to dampen such postprandial excursions. Therefore, the study's aim was to investigate postprandial glucose and insulin responses to a low glycemic index (GI) meal in the morning compared to night in healthy volunteers...
November 22, 2017: Clinical Nutrition: Official Journal of the European Society of Parenteral and Enteral Nutrition
Nataly Zion, Anat Drach-Zahavy, Tamar Shochat
Sleepiness is a common complaint during the night shift and may impair performance. The current study aimed to identify bio-psycho-social factors associated with subjective sleepiness during the night shift. Ninety-two female nurses working rotating shifts completed a sociodemographic questionnaire, the Munich ChronoType Questionaire for shift workers, the Pittsburg Sleep Quality Index and the Pre-sleep Arousal Scale. Subjective sleepiness was measured hourly during two night shifts using the Karolinska Sleepiness Scale, and activity monitors assessed sleep duration 24-hours before each shift...
December 14, 2017: Ergonomics
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