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The impact of night shift work on breast cancer
Results from the Burden of Occupational Cancer in Canada Study Background: We estimated the proportion and number of female breast cancer cases in Canada attributable to night shift work, a probable cause of breast cancer. Methods: Levin's equation was used to calculate population attributable fractions (PAFs) among Canadian women who ever worked night/rotating shifts from 1961 to 2000, accounting for labor turnover and survival to the year 2011. The calculated PAFs were applied to 2011 Canadian breast cancer incidence statistics to obtain the number of attributable cases. Results: Approximately...
Gender differences in injuries attributed to workplace violence in Ontario 2002-2015
Objectives: The aim of the study is to compare trends in the incidence of injury resulting from workplace violence for men and women at the population level over the period 2002–2015 among working-age adults in Ontario, Canada. Methods: Administrative records of injury resulting from workplace violence were obtained from two population-based data sources in Ontario: 21 228 lost-time workers' compensation claims (2002–2015) and 13 245 records of non-scheduled emergency department visits (2004–2014), where the main problem was attributed to a workplace violence...
Do age and gender contribute to workers’ burnout symptoms?
Background: Despite mounting evidence on the association between work stress and burnout, there is limited knowledge about the extent to which workers' age and gender are associated with burnout. Aims: To evaluate the relationship between age, gender and their interaction with burnout in a sample of Canadian workers. Methods: Data were collected in 2009–12 from a sample of 2073 Canadian workers from 63 workplaces in the province of Quebec. Data were analysed with multilevel regression models to test for linear and non-linear relationships between age and burnout. Analyses adjusted for...
Post-traumatic Reactions and Their Predictors among Workers Who Experienced Serious Violent Acts
Are There Sex Differences? Background: Serious violent acts (e.g. physical violence, robbery, sexual aggression and death threats) are among the most visible and notable examples of workplace violence. Although women are commonly found to be at higher risk for post-traumatic reactions following workplace violence, little is known as regards sex differences concerning the types of post-traumatic reactions and their predictors. Objective: This study aimed to describe sex differences in the post-traumatic reactions of serious violent acts and the predictors of such reactions. Methods: The study was...
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...
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...
Outdoor Light at Night and Breast Cancer Incidence in the Nurses’ Health Study II
Background: Animal and epidemiologic studies suggest that exposure to light at night (LAN) may disrupt circadian patterns and decrease nocturnal secretion of melatonin, which may disturb estrogen regulation, leading to increased breast cancer risk.Objectives: We examined the association between residential outdoor LAN and breast cancer incidence using data from the nationwide U.S.-based Nurses' Health Study II cohort.Methods:We followed 109,672 women from 1989 through 2013. Cumulative LAN exposure was estimated using time-varying satellite data for a composite of persistent nighttime illumination...
Does influence at work modify the relation between high occupational physical activity and risk of heart disease in women?
Purpose: To investigate whether influence at work modifies the association between demanding and strenuous occupational physical activity (OPA) and risk of ischaemic heart disease (IHD). Methods: A sample of 12,093 nurses aged 45–64 years from the Danish Nurse Cohort Study was followed for 20.6 years by individual linkage to incident IHD in the Danish National Patient Registry. Information on OPA, influence at work, other occupational factors and known risk factors for IHD was collected by self-report in 1993. Results: During follow-up 869 nurses were hospitalised with incident IHD. Nurses...
Chronic Disease Risks From Exposure to Long-Hour Work Schedules Over a 32-Year Period
Objectives: This study aims at evaluating the chronic disease risk related to prolonged work in long-hour schedules for eight major chronic diseases: heart disease, non-skin cancer, arthritis, diabetes, chronic lung disease, asthma, chronic depression, and hypertension. Methods: The study used data from the National Longitudinal Survey of Youth, 1979 covering 32 years of job history (1978 to 2009) for 7492 respondents. Logistic regression analyses were performed to test the relationship between average weekly work hours, and the reported prevalence of those conditions for each individual. Results...
Gender-specific association between night-work exposure and type-2 diabetes
Results from longitudinal study of adult health, ELSA-Brasil Objectives Diabetes is a multifactorial disease of increasing prevalence. The literature suggests an impact of night work on metabolic components, though the relationship with diabetes is unclear. Our aim was to investigate gender-specific associations between night work and type-2 diabetes (DM2) or impaired glucose tolerance (IGT) using baseline data of the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil). Methods The cohort comprised 15 105 civil servants, aged 35–74 years. Baseline assessments (2008–2010) included...
Workplace stress and working from home influence depressive symptoms among employed women with young children
BACKGROUND: Poor balance between work and family can be a major stressor for women with young children and have a negative impact on emotional well-being. Family-friendly workplace attributes may reduce stress and depressive symptoms among this population. However, few studies have analyzed the role of specific workplace attributes on mental health outcomes among women with young children because available data are limited. PURPOSE: This study examines the impact of workplace attributes on changes in depressive symptoms among working women with young children between 6 and 24 months of age. METHOD...
Physical Capacity and Risk for Long-Term Sickness Absence
A Prospective Cohort Study Among 8664 Female Health Care Workers Objective: To assess the prospective associations between self-reported physical capacity and risk of long-term sickness absence among female health care workers. Methods: Female health care workers answered a questionnaire about physical capacity and were followed in a national register of sickness absence lasting for two or more consecutive weeks during 1-year follow-up. Using Cox regression hazard ratio analyses adjusted for age, smoking, body mass index, physical workload, job seniority, psychosocial work conditions, and previous...
Precarious employment and new-onset severe depressive symptoms
A population-based prospective study in South Korea Objectives: Considering the effect of sex and head of household responsibilities, this study was designed to evaluate whether precarious employment is associated with the development of new-onset severe depressive symptoms. Methods: We followed 1699 male and 1066 female waged workers, ≤59 years of age and without moderate depressive symptom, from the Korean Welfare Panel Study 2007–2013. Their employment status was classified as full-time permanent, precarious, self-employed, or unemployed after baseline. Except for occupation and company...
Femmes-hommes : quelles différences d’exposition aux risques psychosociaux ?
L'Anact a réalisé un état des lieux des facteurs psychosociaux de risques au travail et de la santé mentale des femmes et des hommes au travail. Pour cela, l'auteure, Anne-Marie Nicot, a réalisé une approche par genre des données statistiques nationales. Source: http://www.anact.fr/web/actualite/essentiel?p_thingIdToShow=39947654
For better or worse? Changing shift schedules and the risk of work injury among men and women
Objectives: The aim of this study was to examine the risk of work injury associated with changes in shift schedules and identify whether work injury risks differ between men and women. Methods: Longitudinal panels from the Survey of Labor and Income Dynamics were used to describe work schedule patterns over a 6-year period among a representative sample of Canadian workers (N=19 131). Cox regression was used to estimate the risk of work injury among workers who (i) switched from regular day to nonstandard shifts, (ii) switched from nonstandard to day shifts and (iii) remained in nonstandard shifts...
Harcèlement sexuel au travail
Le défenseur des droits publie une enquête exclusive L'enquête réalisée par le Défenseur des droits révèle que, aujourd'hui, en France, 1 femme sur 5 déclare avoir été victime de harcèlement sexuel au travail, ce qui viennent confirmer les propos des témoins, également ciblés par l'enquête. Les gestes et propos à connotation sexuelle sans le consentement de la personne et un environnement de travail avec des blagues à caractère sexuel sont, avec le chantage...
The impact of job stress due to the lack of organisational support on occupational injury
OBJECTIVES : The aim of this study was to analyse the association between job stress and occupational injuries. METHODS : A prospective cohort study in a sample of 10 667 workers belonging to the insured population of the Mutual Insurance Company in Spain. Job stress was assessed with the Spanish version of the Job Stress Survey. A 1-year follow-up of the workers' clinical records was conducted to determine the incidence of occupational injuries, and the incidence rate per 1000 workers-year was calculated. The associations between the incidence of occupational injuries, job stress and job stress...
Genre : des inégalités de santé et de conditions de travail ?
Depuis 10 ans, l'analyse des statistiques d'accidents du travail, de trajet et de maladies professionnelles montre des évolutions différenciées selon le sexe. Si en 2010, les accidents du travail des femmes représentent un tiers des 650 000 accidents du travail, leur nombre a augmenté de 23% sur la période 2000-2010, alors que le nombre d'accidents du travail des hommes a diminué de 21%. En 2009, pour la 1ère fois, les accidents de trajet des femmes dépassent ceux des hommes. En 2010, pour la 1ère fois, le nombre...
Nested case–control study of night shift work and breast cancer risk among women in the Danish military
Objectives : Growing but limited evidence suggests that night shift work is associated with breast cancer. The authors conducted a nationwide case–control study nested within a cohort of 18?551 female military employees born in 1929–1968 to investigate the risk for breast cancer after night shift work and to explore the role of leisure time sun exposure and diurnal preference. Methods : The authors documented 218 cases of breast cancer (1990–2003) and selected 899 age-matched controls from the cohort by incidence density sampling. Information on shift work, sun exposure habits...
Circadian gene expression in peripheral blood leukocytes of rotating night shift nurses
Objective : It has been hypothesized that the underlying mechanism of elevated breast cancer risk among long-term, night-working women involves circadian genes expression alteration caused by exposure to light at night and/or irregular work hours. The aim of the present study was to determine the effect of rotating night shift work on expression of selected core circadian genes. Methods : The cross-sectional study was conducted on 184 matched nurses and midwives, who currently work either day or rotating night shifts, to determine the effect of irregular work at night on circadian gene expression...
Association between change in employment status and new-onset depressive symptoms in South Korea
A gender analysis Objectives: This study aimed to investigate the association of change in employment status with new-onset depressive symptoms, particularly differences stemming from workers' gender, in South Korea. Methods: We analyzed data from the ongoing Korean Welfare Panel Study. After excluding participants who had depressive symptoms at baseline (2007), we analyzed 2891 participants who became a precarious or permanent worker or unemployed at follow-up (2008) among waged workers who were permanent or precarious workers at baseline. Workers were classified as permanent workers if they...
Work at night and breast cancer
Report on evidence-based options for preventive actions In 2007, the International Agency for Research on Cancer classified shift work involving circadian disruption as probably carcinogenic to humans (group 2A), primarily based on experimental and epidemiologic evidence for breast cancer. In order to examine options for evidence-based preventive actions, 16 researchers in basic, epidemiological and applied sciences convened at a workshop in Copenhagen 26–27 October 2011. This paper summarizes the evidence from epidemiological and experimental studies and presents possible recommendations...
Bullying at work and onset of a major depressive episode among Danish female eldercare workers
Objective The aim of this study was to analyze whether exposure to workplace bullying among 5701 female employees in the Danish eldercare sector increases the risk of onset of a major depressive episode (MDE). Methods Participants received questionnaires in 2004–2005 and again in 2006–2007. MDE was assessed with the Major Depression Inventory. We examined baseline bullying as a predictor of onset of MDE at follow-up using multiple logistic regression. We further conducted a cross-sectional analysis at the time of follow-up among participants who at baseline were free of bullying, MDE...
Breast cancer link to shiftwork confirmed
Nearly 2,000 women contract breast cancer every year in the UK because they work night shifts, according to a new report. The figure, published by the Health and Safety Executive (HSE), is based on 2005 data and attributes 1,969 new cases of breast cancer and 555 deaths from the disease that year to shiftwork. It says: 'The estimate of nearly 2,000 breast cancer registrations due to shiftwork in our study is 54 per cent of all female occupationally-related cancer registrations.' Professor Andrew Watterson, head of occupational health research at Stirling University, urged HSE last year...

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