Social adversity in adolescence increases the physiological vulnerability to job strain in adulthood: a prospective population-based study

How do labour market conditions explain the development of mental health over the life-course? a conceptual integration of the ecological model with life-course epidemiology in an integrative review of results from the Northern Swedish Cohort

BACKGROUND

The aim of this study was to contribute to the theoretical development within the field of labour market effects on mental health during life by integrating Bronfenbrenner's ecological model with mainly earlier theoretical work on life-course theory.

METHODS

An integrative review was performed of all 52 publications about labour market conditions in relation to mental health from the longitudinal Northern Swedish Cohort study. Inductive and deductive qualitative content analysis were performed in relation to Bronfenbrenner's ecological framework combined with life-course theories.

RESULTS

The following nine themes were identified: 1. Macroeconomic recession impairs mental health among young people. 2. The mental health effects on individuals of youth unemployment seem rather insensitive to recession. 3. Small but consistent negative effect of neighbourhood unemployment and other work-related disadvantaged on individuals' mental health over life. 4. Youth unemployment becomes embodied as scars of mental ill-health over life. 5. Weak labour market attachment impairs mental health over life. 6. Bidirectional relations between health and weak labour market attachment over life. 7. Macrolevel structures are of importance for how labour market position cause poor health. 8. Unequal gender relations at work impacts negatively on mental health. 9. The agency to improve health over life in dyadic relations. Unemployment in society permeates from the macrolevel into the exolevel, defined by Bronfenbrenner as for example the labour market of parents or partners or the neighbourhood into the settings closest to the individual (the micro- and mesolevel) and affects the relations between the work, family, and leisure spheres of the individual. Neighbourhood unemployment leads to poor health among those who live there, independent of their employment status. Individuals' exposure to unemployment and temporary employment leads to poorer mental health over the life-course. Temporal dimensions were identified and combined with Bronfenbrenner levels into a contextual life-course model CONCLUSION: Combining the ecosocial theory with life-course theories provides a framework for understanding the embodiment of work-related mental health over life. The labour market conditions surrounding the individual are of crucial importance for the embodiment of mental health over life, at the same time as individual agency can be health promoting. Mental health can be improved by societal efforts in regulations of the labour market.

Allostatic Load Measurement: A Systematic Review of Reviews, Database Inventory, and Considerations for Neighborhood Research

BACKGROUND

Neighborhoods are critical to understanding how environments influence health outcomes. Prolonged environmental stressors, such as a lack of green spaces and neighborhood socioeconomic disadvantage, have been associated with higher allostatic load levels. Since allostatic load levels experienced earlier in life have stronger associations with mortality risk, neighborhoods may be uniquely suited to monitor and mitigate the impacts of environmental stressors. Researchers often study allostatic load in neighborhoods by utilizing administrative boundaries within publicly accessible databases as proxies for neighborhoods.

METHODS

This systematic review of reviews aims to identify commonly used biomarkers in the measurement of allostatic load, compare measurement approaches, inventory databases to study allostatic load, and spotlight considerations referenced in the literature where allostatic load is studied in neighborhoods. The review was conducted using the search term "allostatic load" in the MEDLINE, CINAHL, and PsychINFO databases. The search results were filtered to include reviews.

RESULTS

The search returned 499 articles after deduplication. Overall, 18 synthesis reviews met the inclusion criteria and were retained for extraction. The synthesis reviews analyzed represented 238 studies published from 1995 to 2020. The original ten biomarkers were most often used to measure allostatic load. More recently, body mass index and C-reactive protein have additionally been frequently used to measure allostatic load burden.

CONCLUSIONS

The scientific contributions of this study are that we have identified a clear gap in geographic considerations when studying allostatic load. The implication of this study is that we have highlighted geographic concepts when conducting neighborhood-level research using administrative databases as a neighborhood proxy and outlined emerging future trends that can enable future study of allostatic load in the neighborhood context.

Adulthood Psychosocial Disadvantages and Risk of Hypertension in U.S. Workers: Effect Modification by Adverse Childhood Experiences

Hypertension is a key driver of cardiovascular diseases. However, how stressors contribute to the development of hypertension remains unclear. The objective of this study was to examine prospective associations of adverse childhood experiences (ACEs) and adulthood psychosocial disadvantages (APDs) with incident hypertension. Data were from the Mid-life in the United States (MIDUS) study, a national, population-based, prospective cohort study. ACEs were examined via retrospective reports, and APDs including work stress and social isolation were assessed using survey measures. Incident hypertension was defined based on self-reported physician diagnosis. Baseline data were collected in 1995, with follow-up in 2004-2006 and 2013-2014. Cox proportional hazards regression was applied to assess prospective associations of ACEs and APDs with incident hypertension in 2568 workers free from hypertension at baseline. After adjustment for covariates, baseline APDs were associated with increased incident hypertension (aHR and 95% CI = 1.48 [1.09, 2.01]) during a 20-year follow-up, whereas ACEs showed null associations. Moreover, a moderating effect by ACEs was observed-the effect of APDs on risk of hypertension was stronger when ACEs were present (aHR and 95% CI = 1.83 [1.17, 2.86]). These findings underscore the importance of psychosocial stressors as nontraditional risk factors of cardiometabolic disorders.

Allostatic Load and Its Impact on Health: A Systematic Review

INTRODUCTION

Allostatic load refers to the cumulative burden of chronic stress and life events. It involves the interaction of different physiological systems at varying degrees of activity. When environmental challenges exceed the individual ability to cope, then allostatic overload ensues. Allostatic load is identified by the use of biomarkers and clinical criteria.

OBJECTIVE

To summarize the current knowledge on allostatic load and overload and its clinical implications based on a systematic review of the literature.

METHODS

PubMed, PsycINFO, Web of Science, and the Cochrane Library were searched from inception to December 2019. A manual search of the literature was also performed, and reference lists of the retrieved articles were examined.We considered only studies in which allostatic load or overload were adequately described and assessed in either clinical or non-clinical adult populations.

RESULTS

A total of 267 original investigations were included. They encompassed general population studies, as well as clinical studies on consequences of allostatic load/overload on both physical and mental health across a variety of settings.

CONCLUSIONS

The findings indicate that allostatic load and overload are associated with poorer health outcomes. Assessment of allostatic load provides support to the understanding of psychosocial determinants of health and lifestyle medicine. An integrated approach that includes both biological markers and clinimetric criteria is recommended.

How About the Psychological Pandemic? Perceptions of COVID-19 and Work-Life of Private Sector Employees-A Qualitative Study

COVID-19 had a devastating and profound impact worldwide. The business world has been turbulent, and countries' economic landscape has shown dismal performance. There have been massive downsizing of employees and deductions of pay in most organisations as the pandemic outbreak negatively impacted the business environment. The study aimed to analyse the impact of COVID-19 on the psychology of employees working in private organisations. A qualitative analysis was conducted with 22 middle-level Indian employees employed in private sector organisations. Content analysis was performed from the transcripts and themes; coding categories were developed. Participation in the study was voluntary and was carried out through informed consent. The results demonstrated that the participants experienced psychological stress, social disconnectedness, and a sense of loneliness over the lockdown period.

Furthermore, the semi-structured interviews also revealed the perceptions of the job, career prospects, and the fear of the imminent looming future ahead. The pandemic has raised serious questions on the employee’s mental health and engagement issues. Managerial implications have been discussed with suggestions to alleviate the current professional and psychological challenges.

Allostatic load and women's brain health: A systematic review

Allostatic load represents the 'wear and tear' of chronic stress on the brain and body that may differ between men and women. A small but growing number of studies are assessing allostatic load in relation to mental health. The objective of this systematic review was to (1) assess sex differences in allostatic load and (2) identify allostatic load associations that are specific to women. We systematically searched for allostatic load studies that included psychosocial causes and/or psychiatric consequences. Our search focused on allostatic load studies that disaggregated by sex and that include women. Sixty-two studies were included in this systematic review. First, men appear to have higher allostatic load than women. Second, women show gender-specific variation for numerous factors such as age, race/ethnicity, adversities, social support, and health behaviors that influence associations between allostatic load and mental health. Recommendations are made to guide researchers advance sex and gender approaches.

Association of childhood adversities and home atmosphere with functioning in old age: the Helsinki birth cohort study

Objective

childhood adversities have been linked with adverse health outcomes, but less is known about the long-term consequences of childhood home atmosphere. We investigated whether childhood adversities and home atmosphere were associated with physical and mental functioning in older age.

Methods

in the Helsinki Birth Cohort Study 2003, participants born in the year 1934-44 had data available on nine childhood home atmosphere items, e.g. whether it was supportive and warm (sum score ranged between 0 and 36, higher score indicating better atmosphere), and nine childhood adversities, e.g. unemployment and divorce (sum score 0-9, coded into no; one; and two or more adversities) assessed in 2001-04. Of those, 835 had data on physical and mental functioning assessed using the Short Form 36 questionnaire in 2011-13.

Results

those who had experienced two or more childhood adversities were more likely to have poorer physical and mental functioning in older age compared to those with no adversities. A better home atmosphere score was associated with better mental functioning (per one unit higher score β 0.24, 95% CI 0.16-0.32, P < 0.001). In models including both childhood adversities and home atmosphere, a more favourable home atmosphere was associated with better mental functioning while the association for childhood adversities attenuated. There were no associations between childhood adversities or home atmosphere and physical functioning in the models that included both childhood exposures.

Conclusions

childhood adversities and home atmosphere have long-term associations with physical and mental functioning in older age.

Work-Home Interference, Perceived Total Workload, and the Risk of Future Sickness Absence Due to Stress-Related Mental Diagnoses Among Women and Men: a Prospective Twin Study

Purpose

Work-home interference has been proposed as an important explanation for sickness absence (SA). Previous studies show mixed results, have not accounted for familial factors (genetics and shared everyday environment), or investigated diagnosis specific SA. The aim was to study whether work-home interference and perceived total workload predict SA due to stress-related mental diagnoses, or SA due to other mental diagnoses, among women and men, when adjusting for various confounders and familial factors.

Methods

This study included 11,916 twins, 19–47 years (49% women). Data on work-to-home and home-to-work conflicts, perceived total workload, and relevant confounders were derived from a 2005 survey, and national register data on SA spells until 2013 were obtained. Odds ratios (ORs) with 95% confidence intervals (CIs) were calculated. Discordant twin pair design was applied to adjust for familial factors.

Results

Each one unit increase in work-to-home and home-to-work conflicts, and perceived total workload was associated with higher odds for SA due to stress-related mental diagnoses and to SA due to other mental diagnoses among women, when adjusting for sociodemographic factors (ORs 1.15–1.31). Including health or familial factors, no associations remained. For men, each one unit increase in work-to-home conflicts was associated with higher odds for SA due to stress-related diagnoses (ORs 1.23–1.35), independently of confounders.

Conclusion

Work-to-home conflict was independently associated with future SA due to stress-related diagnoses among men only. Health- and work-related factors seem to be important confounders when researching work-home interference, perceived total workload, and SA. Not including such confounders involves risking drawing incorrect conclusions. Further studies are needed to confirm sex differences and whether genetic factors are important for the associations studied.

Early life predictors of midlife allostatic load: A prospective cohort study

BACKGROUND

Allostatic load has been suggested as a pathway through which experiences become biologically embedded to influence health. Research on childhood predictors of allostatic load has focused on socioeconomic and psychosocial exposures, while few studies include prospective measures of biomedical exposures. Further, findings on sex differences in the association of childhood predictors with various health outcomes related to allostatic load are ambiguous.

AIMS

To examine the influence of early life biomedical and social factors in the first year of life on midlife allostatic load, assessing potential sex differences.

METHODS

This prospective cohort study includes early life information collected at birth and a one year examination for 1,648 members of the Copenhagen Perinatal Cohort who also participated in the Copenhagen Aging and Midlife Biobank study (aged 49-52 years, 56% women). Allostatic load based on 14 biomarkers was selected as a measure of midlife health status. Early life factors were categorized as predominantly biomedical or social, and their associations with midlife allostatic load were examined in domain-specific and combined sex-stratified multiple regression models.

RESULTS

The biomedical factors model explained 6.6% of the variance in midlife allostatic load in men and 6.7% in women, while the social model explained 4.1% of the variance in men and 7.3% in women. For both sexes, parental socioeconomic position at one year and maternal BMI significantly predicted midlife allostatic load in a model containing all early life factors. For women, additional significant predictors were complications at birth, birth weight and not living with parents at one year.

CONCLUSION

The results confirm an association of lower childhood socioeconomic position with higher adult allostatic load while demonstrating the importance of other prenatal and early life exposures and highlighting potential sex differences.

Child abuse and work stress in adulthood: Evidence from a population-based study

The objective of this study was to examine the association between child abuse and work stress in adulthood. We used data from the 2012 Canadian Community Health Survey (CCHS) Mental Health, a nationally representative cross-sectional survey of Canadians. This study included all participants aged 20years or older who reported being employed the past 12months (N=14,581). Child physical abuse, sexual abuse, and exposure to intimate partner violence were assessed in relation to several work stress-related indicators. Multiple linear and Poisson regression models adjusted for age, sex, education, household income, marital status, occupation group, and any lifetime mental disorder. Child abuse was significantly associated with greater odds of high work stress (IRR: 1.29; 95% CI: 1.16-1.43) in adulthood. More specifically, child abuse was associated with greater odds of job dissatisfaction (IRR: 1.69; 95% CI: 1.31-2.18), job insecurity (IRR: 1.56; 95% CI: 1.27-1.91), and self-perceived low support (IRR: 1.33; 95% CI: 1.22-1.46). It was also associated with high levels of psychological demand (b=0.348; 95% CI: 0.229-0.467) and job strain (b=0.031; 95% CI: 0.019-0.043). Examination of the Karasek's Demand-Control Model using multinomial logistic regression analyses indicated that child abuse was significantly associated with high strain (RRR:1.39; 95% CI: 1.14-1.72) and active (RRR: 1.56; 95% CI: 1.28-1.90) jobs. These findings suggest the negative influence of child abuse on work experience. Success in preventing child abuse may help reduce work-related stress in adulthood.

What role does adolescent neighborhood play for adult health? A cross-classified multilevel analysis of life course models in Northern Sweden

This study examined whether, and by which life course models, adolescent neighborhood environment relate to health in mid-adulthood. Data came from the Northern Swedish Cohort (n=1001), surveyed at age 16, 21, 30 and 42 years including functional somatic symptoms at age 42, and individual disadvantage neighborhood disadvantage at all four ages. Results from cross-classified multilevel models showed that 12.7% of age 42 health variance was explained by an interaction of age 16 and age 42 neighborhood of residence. Our study thus suggests that health variation by neighborhood in mid-adulthood may partly depend on neighborhood of residence in adolescence.

Job Strain and Casual Blood Pressure Distribution: Looking beyond the Adjusted Mean and Taking Gender, Age, and Use of Antihypertensives into Account. Results from ELSA-Brasil

Methodological issues are pointed to as the main sources of inconsistencies in studies about the association between job strain and blood pressure (BP)/hypertension. Our aim was to analyze the relationship between job strain and the whole BP distribution, as well as potential differences by gender, age, and use of antihypertensives. Additionally, we addressed issues relating to the operationalization of the exposure and outcome variables that influence the study of their inter-relations. We evaluated the baseline date of 12,038 participants enrolled in the Brazilian Longitudinal Study of Adult Health (ELSA-Brasil) (2008–2010), a multicenter cohort study of 35–74-year-old civil servants. Job strain was assessed by the Demand-Control-Support Questionnaire. The distribution of casual BP by categories of job strain was compared by a combination of exploratory techniques. Participants were classified into three subgroups (normotensives, medicated hypertensives, and unmedicated hypertensives), and analyses were stratified by gender and age. The relationship between job strain and casual BP varied along the whole outcome distribution. Hypertensive participants had greater differences in casual BP by job strain category, especially medicated hypertensives. Differences in casual BP were also greater for systolic than for diastolic BP and for older participants. No differences were encountered by gender. The exclusion of participants susceptible to misclassification for the exposure and outcome variables increased the differences observed between the categories of low and high job strain. In conclusion, the relationship between job strain and casual BP varied along the whole outcome distribution and by use of antihypertensive drugs, age, and BP parameter evaluated. Misclassification for exposure and outcome variables should be considered in analyses of this topic.

The Role of Occupational Status in the Association Between Job Strain and Ambulatory Blood Pressure During Working and Nonworking Days

OBJECTIVES

The objectives of this study were to determine whether job strain is more strongly associated with higher ambulatory blood pressure (ABP) among blue-collar workers compared with white-collar workers, to examine whether this pattern generalizes across working and nonworking days and across sex, and to examine whether this pattern is accounted for by psychosocial factors or health behaviors during daily life.

METHODS

A total of 480 healthy workers (mean age = 43 years, 53% female) in the Adult Health and Behavior Project-Phase 2 completed ABP monitoring during 3 working days and 1 nonworking day. Job strain was operationalized as high psychological demand (> sample median) combined with low decision latitude (

RESULTS

Covariate-adjusted multilevel random coefficient regressions demonstrated that associations between job strain and systolic and diastolic ABP were stronger among blue-collar workers compared with white-collar workers (b = 6.53 [F(1,464) = 3.89, p = .049] and b = 5.25 [F(1,464) = 6.09, p = .014], respectively). This pattern did not vary by sex, but diastolic ABP findings were stronger when participants were at work. The stronger association between job strain and ABP among blue-collar workers was not accounted for by education, momentary physical activity, or substance use, but was partially accounted for by covariation between higher hostility and blue-collar status.

CONCLUSIONS

Job strain is associated with ABP among blue-collar workers. These results extend previous findings to a mixed-sex sample and nonworking days and provide, for the first time, comprehensive exploration of several behavioral and psychosocial explanations for this finding.

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Key Words

• occupational stress
• socioeconomic status
• cardiovascular
• ambulatory blood pressure
• reserve capacity
• job strain

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MESH Headings

• Adult
• Blood Pressure/physiology
• Blood Pressure Monitoring, Ambulatory
• Female
• Humans
• Male
• Middle Aged
• Occupational Diseases/epidemiology
• Occupations/statistics & numerical data
• Stress, Psychological/epidemiology
• Time Factors

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Grants

• CC999999 Intramural CDC HHS
• P01 HL040962 NHLBI NIH HHS
• T32 HL007560 NHLBI NIH HHS

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Affiliation(s)

Nataria T Joseph From the Social Sciences Division (Joseph), Pepperdine University, Malibu, California; Heart and Vascular Institute, Department of Medicine (Muldoon), University of Pittsburgh School of Medicine, Pittsburgh, Pennsylvania; Departments of Psychology (Manuck); Psychiatry, Psychology, and Epidemiology (Matthews); and Psychology and Psychiatry (Kamarck), University of Pittsburgh, Pittsburgh, Pennsylvania; and National Institute for Occupational Safety and Health (MacDonald, Grosch), Washington DC
Matthew F Muldoon
Stephen B Manuck
Karen A Matthews
Leslie A MacDonald
James Grosch
Thomas W Kamarck

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Job Demands and Job Control as Predictors of Depressive Symptoms: Moderating Effects of Negative Childhood Socioemotional Experiences

There have been calls to know more about vulnerability factors that may predispose to adverse health outcomes at work. We examined if childhood adverse experiences would affect vulnerability to psychosocial stress factors at work. A nationally representative sample of 1546 Finnish men and women was followed up from childhood to adulthood. Childhood adverse experiences consisted of socioeconomic and emotional factors. Job demands and job control were measured 21 years later, and depressive symptoms were measured 21 and 27 years after the childhood measurements. Job demands predicted depressive symptoms over 6 years, and the association was modified by childhood emotional adversity. Participants with three or more emotional adversities in childhood had more depressive symptoms in response to high job demands compared with participants with zero or one emotional adversities in childhood (Betas = -1.40 and -2.01, ps < 0.05 and <0.01). No such moderating effect by childhood adverse experiences was found for the association between job control and depressive symptoms. Although modest in effect size, these findings provide a developmental viewpoint for understanding the role of childhood experiences in work-related stress factors. Such knowledge can enhance understanding of individual differences in vulnerability to the demands of working life. Copyright © 2015 John Wiley & Sons, Ltd.

High Job Demands, Job Strain, and Iso-Strain are Risk Factors for Sick Leave due to Mental Disorders: A Prospective Swedish Twin Study With a 5-Year Follow-Up

OBJECTIVE

To investigate whether psychosocial work environment and health behaviors are risk factors for sick leave due to mental disorders, and whether familial confounding (genetics and shared environment) explains the associations.

METHODS

Respondents (n = 11,729), given to complete a questionnaire in 2004 to 2006, were followed up approximately 5 years for sick leave spells due to mental disorders, using national registry data. Data were analyzed using logistic regression, and conditional logistic regression for twin pairs discordant for sick leave (cotwin control).

RESULTS

High job demands, job strain, and iso-strain were independent risk factors for sick leave due to mental disorders. Familial factors seem to be of importance in the associations between job support, smoking, a combination of unhealthy behaviors and sick leave.

CONCLUSIONS

Improving the psychosocial work environment may be effective in preventing sick leave due to mental disorders.

Midlife mental distress and risk for dementia up to 27 years later: the Nord-Trøndelag Health Study (HUNT) in linkage with a dementia registry in Norway

Background

Dementia is an increasing public health challenge, and the number of individuals affected is growing rapidly. Mental disorders and symptoms of mental distress have been reported to be risk factors for dementia. The aim of this study was to examine whether midlife mental distress is a predictor for onset of dementia later in life.

Methods

Using data from a large population-based study (The Nord-Trøndelag Health Study; HUNT1) linked to a dementia registry (The Health and Memory study; HMS) enabling a maximum 27 years of follow-up, we ascertained mental distress and subsequent dementia status for 30,902 individuals aged 30–60 years at baseline. In HUNT1, self-reported mental distress was assessed using the four-item Anxiety and Depression Index (ADI-4). Dementia status was ascertained from HMS, which included patient and caregiver history, cognitive testing and clinical and physical examinations from the hospitals and nursing homes serving the catchment area of HUNT1. In the main analysis, unadjusted and adjusted logistic regression models were computed for the prospective association between mental distress and dementia. In secondary analyses, two-way age and gender interactions with mental distress on later dementia were examined.

Results

A 50% increased odds for dementia among HUNT1-participants reporting mental distress was found (crude odds ratio (OR): 1.52; 95% CI 1.15–2.01), and a 35% increase in the fully adjusted model (OR 1.35; 95% CI 1.01-1.80). In secondary analyses, we found evidence for a two-way interaction with age on the association between mental distress and dementia (p = 0.030): the age- and gender adjusted OR was 2.44 (95% CI 1.18–5.05) in those aged 30–44 years at baseline, and 1.24 (0.91–1.69) in 45–60 year olds.

Conclusions

Our results indicate an association between midlife mental distress and increased risk of later dementia, an association that was stronger for distress measured in early compared to later midlife. Mental distress should be investigated further as a potentially modifiable risk factor for dementia.

Electronic supplementary material

The online version of this article (doi:10.1186/s12877-015-0020-5) contains supplementary material, which is available to authorized users.

Job demand and control in mid-life and physical and mental functioning in early old age: do childhood factors explain these associations in a British birth cohort?

OBJECTIVES

Adverse work-related exposures have been linked with decreased physical and mental functioning in later life, however, whether childhood factors explain the associations between work exposures and functioning is unknown. Our aim was to investigate if job demand and control in mid-life were related to self-reported physical and mental functioning in early old age and whether childhood factors explained these associations.

DESIGN

Prospective cohort study.

SETTING

England, Scotland and Wales.

PARTICIPANTS AND OUTCOME MEASURES

Data come from the UK Medical Research Council National Survey of Health and Development, a cohort with follow-up since birth in 1946. 1485 occupationally active study members had data available on job demand and control in mid-life and on physical and mental functioning assessed using the Short Form-36 questionnaire at 60-64 years.

RESULTS

Those with higher job control in mid-life had better physical functioning than those who reported lower job control (β 0.51, 95% CI 0.02 to 1.01, p=0.04 adjusted for adult confounders). Those with higher job demand in mid-life had poorer mental functioning (β -0.82, 95% CI -1.14 to -0.51, p<0.001). Associations between job control and mental functioning were similar but less pronounced. Adjustment for childhood factors (father's and mother's educational attainment, parents' interest in school at age 7 and cognitive ability at age 8) partially explained the association between job control and physical functioning, but did not explain the association between job demand and mental functioning.

CONCLUSIONS

Job demand and control in mid-life are differentially associated with mental and physical functioning in early old age and some of these associations may be partially explained by childhood factors.

Sex-specific interaction effects of age, occupational status, and workplace stress on psychiatric symptoms and allostatic load among healthy Montreal workers

Socio-demographics and workplace stress may affect men and women differently. The aim of this cross-sectional study was to assess sex-specific interactions among age, occupational status, and workplace Demand-Control-Support (D-C-S) factors in relation to psychiatric symptoms and allostatic load levels representing multi-systemic "wear and tear". It was hypothesized that beyond main effects, D-C-S factors would be moderated by occupational status and age in sex-specific directions predictive of subjective psychiatric symptoms and objective physiological dysregulations. Participants included healthy male (n = 81) and female (n = 118) Montreal workers aged 20 to 64 years (Men: M = 39.4 years, SD = 11.3; Women: M = 42.8 years, SD = 11.38). The Job Content Questionnaire was administered to assess workplace D-C-S factors that included psychological demands, decisional latitude, and social support. Occupational status was coded using the Nam--Powers--Boyd system derived from the Canadian census. Psychiatric symptoms were assessed using the Beck Anxiety Scale and the Beck Depression Inventory II. Sex-specific allostatic load indices were calculated based on fifteen biomarkers. Regression analyses revealed that higher social support was associated with less depressive symptoms in middle aged (p = 0.033) and older men (p = 0.027). Higher occupational status was associated with higher allostatic load levels for men (p = 0.035), while the reverse occurred for women (p = 0.048). Women with lower occupational status but with higher decision latitude had lower allostatic load levels, as did middle-aged (p = 0.031) and older women (p = 0.003) with higher psychological demands. In summary, age and occupational status moderated workplace stress in sex-specific ways that have occupational health implications.

The importance of genetic and shared environmental factors for the associations between job demands, control, support and burnout

Within occupational health research, one of the most influential models is the Job Demands-Control-Support model. Numerous studies have applied the model to different domains, with both physical and psychological health outcomes, such as burnout. The twin design provides a unique and powerful research methodology for examining the effects of environmental risk factors on burnout while taking familial factors (genetic and shared environment) into account. The aim of the present study was to investigate the impact of familial factors on the associations of burnout with job demands, control and support. A total of 14 516 individuals from the Swedish Twin Registry, who were born between 1959 and 1986, and who participated in the Study of Twin Adults: Genes and Environment (STAGE) by responding to a web-based questionnaire in 2005, were included in the analyses. Of these, there were 5108 individuals in complete same-sex twin pairs. Co-twin control analyses were performed using linear mixed modeling, comparing between-pairs effects and within-pair effects, stratified also by zygosity and sex. The results indicate that familial factors are of importance in the association between support and burnout in both women and men, but not between job demands and burnout. There are also tendencies towards familial factors being involved in the association between control and burnout in men. These results offer increased understanding of the mechanisms involved in the associations between work stress and burnout.

Common psychosocial stressors in middle-aged women related to longstanding distress and increased risk of Alzheimer's disease: a 38-year longitudinal population study

OBJECTIVE

To study the relation among psychosocial stressors, long-standing distress and incidence of dementia, in a sample of women followed from midlife to late life.

DESIGN

Prospective longitudinal population study.

SETTING

The analyses originate from the prospective population study of women in Gothenburg, Sweden, a representative sample of women examined in 1968 (participation rate 90%) and re-examined in 1974, 1980, 1992, 2000 and 2005.

PARTICIPANTS

800 women born in 1914, 1918, 1922 and 1930 who were systematically selected for a psychiatric examination at baseline, in 1968.

PRIMARY AND SECONDARY OUTCOME MEASURES

18 psychosocial stressors (eg, divorce, widowhood, work problems and illness in relative) were obtained at baseline. Symptoms of distress were measured according to a standardised question at each study wave. Dementia was diagnosed according to Diagnostic and Statistical Manual of Mental Disorders (DSM-III-R) criteria based on information from neuropsychiatric examinations, informant interviews, hospital records, and registry data, and measured through the whole study period.

RESULTS

During the 37 years of follow-up, 153 women developed dementia (104 of those had Alzheimer's disease (AD)). Number of psychosocial stressors in 1968 was associated (HR, 95% CI) with higher incidence of dementia (1.15, 1.04 to 1.27) and AD (1.20, 1.07 to 1.35) between 1968 and 2005, in multivariate Cox regressions. Number of psychosocial stressors in 1968 was also associated (OR, 95% CI) with distress in 1968 (1.48, 1.32 to 1.67), 1974 (1.31, 1.17 to 1.46), 1980 (1.27, 1.11 to 1.45), 2000 (1.39, 1.14 to 1.70) and 2005 (1.35, 1.02 to 1.79), in multivariate logistic regressions. Number of psychosocial stressors (HR 1.17, 95% CI 1.03 to 1.33) and long-standing distress (1968-1974-1980) (HR 1.58, 95% CI 1.03 to 2.45) were independently associated with AD.

CONCLUSIONS

Our study shows that common psychosocial stressors may have severe and long-standing physiological and psychological consequences. However, more studies are needed to confirm these results and investigate whether more interventions such as stress management and behavioural therapy should be initiated in individuals who have experienced psychosocial stressors.

Determinants in adolescence for adult sickness absence in women and men: a 26-year follow-up of a prospective population based cohort (Northern Swedish cohort)

BACKGROUND

To date little is known regarding how factors measured in adolescence predict sickness absence in adulthood, and whether different patterns of factors exist for women and men that could contribute to an explanation of adult gender differences in sickness absence.

METHODS

All pupils in the last year of compulsory school in the municipality of Luleå with complete information from surveys (questionnaires) in 1981 and 1983 (compulsory and upper-secondary schooling; 16 and 18 years of age, N=719) were followed with register data on medically certified sickness absence (1993-2007). Generalised linear models were applied to calculate Risk Ratios with 95% Confidence Intervals (CI) comparing annual mean numbers of sickness absence spells in exposed versus unexposed groups.

RESULTS

In the multivariate model, the following factors were found to be predictive of future sickness absence in women: participating in an upper secondary school program in 1983 dominated by women (> 60%): 1.41 (95% CI 1.00 - 1.97); sometimes sickness absence from school in 1981: 1.60 (95% CI 1.18 - 2.17) and low parental socioeconomic status in 1981: 2.20 (95% CI 1.44 - 3.38). In men, low school grades in 1981: 4.36 (95% CI 2.06 - 9.22) and fathers not in gainful employment in 1981: 2.36 (95% CI 1.53 - 3.66) were predictive.

CONCLUSION

The findings suggest that sickness absence in adulthood is predicted by factors measured in adolescence. These predictors may differ for women and men. For women, early life absence and social environmental factors, for men low achievements at school and lack of employment of their father seem to be predictive.