Job Strain Status Research Articles

Working life job strain status and cognitive aging in Europe: A 12-year follow-up study

BackgroundTo examine the association of job strain with cognitive ability and the influence of life-course job strain on later life cognitive decline. MethodsData were derived from six waves of the Survey of Health, Aging, and Retirement in Europe. The study sample consists of 13349 participants aged 50 to 98 years at wave 2 and has been followed up for 12-years. Job strain status across working life was assessed using a short demand-control job strain model containing two core dimensions: job demands and job control collected in wave 3. Cognitive abilities concerning episodic memory was assessed by immediate recall and delayed recall tests, executive function was evaluated by verbal fluency test collected in all waves (waves 2–7) except wave 3. Mixed-effects model was used to estimate working life job strain and its cumulative effect on cognitive decline. ResultsBoth passive and high strain jobs were associated with lower levels of cognitive ability (episodic memory and verbal fluency) in comparison with active job. Long exposure to active- or low strain-job was associated with higher cognitive ability whereas long exposure to passive job or moderate duration of high strain job was associated with lower cognitive ability. The rate of memory decline was positively related to moderate duration of passive job and negatively related to long-term exposure to low strain job. LimitationsInformation on working conditions was based on self-reported recollections. ConclusionsWorking life variation in job strain status and their duration may explain individual differences in cognitive ability in later life.

Psychosocial job strain and polypharmacy: a national cohort study.

Objectives:Psychosocial job strain has been associated with a range of adverse health outcomes. The aim of this study was to examine the association between psychosocial job strain and prospective risk of polypharmacy (the prescription of ≥5 medications) and to evaluate whether coping strategies can modify this risk.Methods:Cohort study of 9703 working adults [mean age 47.5 (SD 10.8) years; 54% female] who participated in the Swedish Longitudinal Occupational Survey of Health (SLOSH) at baseline in 2006 or 2008. Psychosocial job strain was represented by job demands and control, and measured by the Swedish version of the demand–control questionnaire. The outcome was incidence of polypharmacy over an eight-year follow-up period. Information on dispensed drugs were extracted from the Swedish Prescribed Drug Register. Logistic regression was used to estimate the association of job strain status with polypharmacy, adjusted for a range of confounders.Results:During the follow-up, 1409 people developed polypharmacy (incident rate: 20.6/1000 person-years). In comparison to workers with low-strain jobs (high control/low demands), those with high-strain jobs (low control/high demands) had a significantly higher risk of incident polypharmacy (OR 1.40, 95% CI 1.04–1.89). The impact of high-strain jobs on developing polypharmacy remained among those with covert coping strategies (ie, directed inwards or towards others) but not among those with open coping strategies (ie, primarily directed toward the stressor).Conclusions:Workers in high-strain jobs may be at an increased risk of polypharmacy. Open coping strategies may reduce the negative impact of psychosocial job strain on risk of polypharmacy.

RE: "CHANGES IN PERCEIVED JOB STRAIN AND THE RISK OF MAJOR DEPRESSION: RESULTS FROM A POPULATION-BASED LONGITUDINAL STUDY"

Major depression is a prevalent mental disorder in the working population. Improving the work environment may reduce the risk of major depression. The authors examined data from the longitudinal cohort of the Canadian National Population Health Survey from 1994–1995 to 2004–2005. Survey participants were classified into 4 groups by changes in job strain status from 1994–1995 to 2000–2001 (no change in low job strain, no change in high job strain, changing from high to low job strain, and changing from low to high job strain). The incidence proportion of major depressive episodes in each of the 4 groups was 4.0%, 8.0%, 4.4%, and 6.9%, respectively. Participants who reported a change from high to low job strain had a risk of major depression similar to those exposed to persistently low job strain. Among those exposed to persistent high job strain, only participants who reported good or excellent health at baseline had a higher risk of major depression, but those who reported fair or poor health did not. Reducing job strain may have positive impacts on the risk of depression. Self-rated health is a strong predictor of depression and plays an important role in the relation between job strain and depression. Canada; cohort studies; depression; occupational health; population; socioeconomic factors; workplace

Changes in Perceived Job Strain and the Risk of Major Depression: Results From a Population-based Longitudinal Study

Major depression is a prevalent mental disorder in the working population. Improving the work environment may reduce the risk of major depression. The authors examined data from the longitudinal cohort of the Canadian National Population Health Survey from 1994-1995 to 2004-2005. Survey participants were classified into 4 groups by changes in job strain status from 1994-1995 to 2000-2001 (no change in low job strain, no change in high job strain, changing from high to low job strain, and changing from low to high job strain). The incidence proportion of major depressive episodes in each of the 4 groups was 4.0%, 8.0%, 4.4%, and 6.9%, respectively. Participants who reported a change from high to low job strain had a risk of major depression similar to those exposed to persistently low job strain. Among those exposed to persistent high job strain, only participants who reported good or excellent health at baseline had a higher risk of major depression, but those who reported fair or poor health did not. Reducing job strain may have positive impacts on the risk of depression. Self-rated health is a strong predictor of depression and plays an important role in the relation between job strain and depression.

The Relationship between Job Stress and Needlestick Injury among Nurses at a University Hospital

Objectives: This cross-sectional study investigated the relationship between job stress and needlestick injury the nurses at a University hospital in Incheon, Korea. Methods: A questionnaire survey was conducted targeting 476 nurses, of which 320 (67.2%) question naires were returned and 256 (53.8%) were regarded as being reliable data for analyses. We estimated the relation of job stress to needlestick injury using univariate and multiple logistic regression analyses. Results: One hundred sixty-five nurses (64.5%) had suffered at least one needlestick injury (included sharp injuries) during the previous year. After adjusting for potential confounders, we found that the high job control group was less likely than the other group to experience needlestick injury (OR=0.51, 95% CI=0.27-0.97). Job demand and social support, however, were unrelated to needlestick injury. The high job strain group was more likely to experience needlestick injury (OR=2.57, CI=1.13-5.83) than the low job strain group. Conclusions: Our results tend to suggest that nurses who were in the low job control or high job strain status were more likely to suffer a high rate of needlestick injury.

Association between job strain status and cardiovascular risk in a population of Taiwanese white-collar workers.

Using data from a survey of a white-collar working population in Taiwan (438 women, 526 men), the relation between job strain status and cardiovascular risk factors (high serum total cholesterol, low serum high-density lipoprotein (HDL) cholesterol, and high plasma fibrinogen) was examined. Job strain indicators, defined by Karasek's model, included psychological demand and decision latitude. Blood pressure, cholesterol and fibrinogen were analyzed as continuous variables, whereas psychological demand and decision latitude were dichotomized into 2 levels and job strain into 4 exposure categories. Plasma fibrinogen was significantly and positively associated with job strain status in both male and female workers and also with decision latitude in female workers only. No consistent association between job strain status and total serum and HDL cholesterol was detectable. In conclusion, plasma fibrinogen is a possible intermediate factor linking occupational stress to elevated cardiovascular risk.

A longitudinal study of job strain and ambulatory blood pressure: results from a three-year follow-up.

This study was conducted to investigate the hypothesis that exposure to "job strain" is related to increased ambulatory blood pressure (ABP). Participants were 195 men who wore an ABP monitor for 24 hours on two occasions 3 years apart. Job strain status, evaluated at each assessment, was used to identify four groups: those not having job strain at either assessment (N = 138), those having job strain at both times (N = 15), and two crossover groups. Regression analysis was used to examine the cross-sectional associations of ABP with job strain, controlling for other known risk factors. Repeated-measures analysis of variance was used to examine the association of ABP change with the category of job strain change. The cross-sectional analysis of the Time 2 data yielded almost identical, highly significant effects of job strain on ABP as was shown in our previously published Time 1 analysis. Those in high strain jobs at both times had systolic/diastolic ABPs at work and at home that were, on average, 11/7 mm Hg higher than those with no job strain at both times; the crossover groups had intermediate levels of ABP. The longitudinal analysis showed that those with a high strain job at Time 1, but not at Time 2, had a significant decrease in work and home ABP of approximately 5/3 mm Hg. The previously reported cross-sectional association between job strain and ABP was replicated at follow-up. The group repeatedly exposed to job strain had higher levels of ABP at Time 2 than either crossover group. Furthermore, change in job strain status partially predicted change in ABP. These results provide new evidence supporting the hypothesis that job strain is an occupational risk factor in the etiology of essential hypertension.