No association found between cardiovascular mortality, and job demands and decision latitude: Experience from the Västerbotten Intervention Programme in Sweden

Prevalence of hypertension and its associated factors among professional drivers: a population-based study

OBJECTIVE

Hypertension is one of the most important causes of cardiovascular disease. It has been found that professional drivers are at high risk of hypertension. This study has been performed to determine the prevalence of hypertension and its associated factors among professional drivers in Shahroud.

METHODS AND RESULTS

In this study, the prevalence of hypertension was determined according to the definition by the American Heart Association among 1461 professional drivers participating in the first cross-sectional phase of Shahroud drivers' prospective cohort study. The prevalence of elevated blood pressure and hypertension was examined based on the initial age, and gender presented, along with the factors affecting this disease based on multinomial logistic regression. The prevalence of elevated blood pressure, stage 1 and 2 hypertension was 46.9%, 6%, and 1.3%, respectively. In the multivariate multinomial logistic regression model, having diabetes, Body Mass Index ≥25, and driving years was associated with an increased chance of developing elevated blood pressure and hypertension.

CONCLUSIONS

Attention should be paid to high prevalence of elevated blood pressure and hypertension among professional drivers in Iran as a health priority for drivers. Plans should be made to reduce it as well as to prevent its complications.

Predicting Sensitivity to Adverse Lifestyle Risk Factors for Cardiometabolic Morbidity and Mortality

People appear to vary in their susceptibility to lifestyle risk factors for cardiometabolic disease; determining a priori who is most sensitive may help optimize the timing, design, and delivery of preventative interventions. We aimed to ascertain a person’s degree of resilience or sensitivity to adverse lifestyle exposures and determine whether these classifications help predict cardiometabolic disease later in life; we pooled data from two population-based Swedish prospective cohort studies (n = 53,507), and we contrasted an individual’s cardiometabolic biomarker profile with the profile predicted for them given their lifestyle exposure characteristics using a quantile random forest approach. People who were classed as ‘sensitive’ to hypertension- and dyslipidemia-related lifestyle exposures were at higher risk of developing cardiovascular disease (CVD, hazards ratio 1.6 (95% CI: 1.3, 1.91)), compared with the general population. No differences were observed for type 2 diabetes (T2D) risk. Here, we report a novel approach to identify individuals who are especially sensitive to adverse lifestyle exposures and who are at higher risk of subsequent cardiovascular events. Early preventive interventions may be needed in this subgroup.

All-cause mortality and the time-varying effects of psychosocial work stressors: A retrospective cohort study using the HILDA survey

The effects of poor-quality work (high job demands, low job control, job insecurity, and effort-reward imbalance) are harmful to health but it isn't clear whether exposure to these psychosocial work stressors over time translates into increased risk of mortality.

OBJECTIVE

We investigated the effect of time-varying psychosocial work stressors on mortality using data from a longitudinal cohort of working Australians by examining association between job control, job demands, job insecurity, unfair pay overtime and all-cause mortality. We examined whether gender modified these relationships.

METHODS

Over 20,000 participants from the Household Income and Labour Dynamics in Australia survey with self-reported repeated exposure measures were followed for 15 years. Survival analysis models with baseline hazard specified by the Weibull distribution were used to examine the association between psychosocial work stressors over time and mortality.

RESULTS

Low job control (HR=1.39; 95% CI: 1.06-1.83) and job insecurity (1.36; 1.06-1.74) were associated with increased risk of mortality. High job demands (1.01; 0.75-1.34) and effort-reward unfairness (1.20; 0.90-1.59) were not associated with mortality. The effect of job insecurity was attenuated (1.20; 0.93-1.54) after controlling for sociodemographic and health risk factors. Male participants exposed to low job control and job insecurity had an 81% and 39% increase risk of mortality, respectively.

CONCLUSIONS

Long-term exposure to low job control and low job security is associated with increased risk of all-cause mortality. Effects were largely restricted to males and persisted after adjustments for sociodemographic and health characteristics. The lack of effects observed for females may have been due to the small number of deaths in females. Awareness of implications of the adverse effects of psychosocial work stressors on health and mortality in workplaces, and interventions to improve job control and job security could contribute to better health and wellbeing, reducing the effect of psychosocial work stressors on mortality.

Psychosocial work exposures of the job strain model and cardiovascular mortality in France: results from the STRESSJEM prospective study

Objectives:

The study aims to explore the prospective associations of the psychosocial work exposures of the job strain model with cardiovascular mortality, including mortality for ischemic heart diseases (IHD) and stroke, using various time-varying exposure measures in the French working population of employees.

Methods:

The study was based on a cohort of 798 547 men and 697 785 women for which job history data from 1976 to 2002 were linked to mortality data and causes of death from the national death registry. Psychosocial work exposures from the validated job strain model questionnaire were assessed using a job-exposure matrix (JEM). Three time-varying measures of exposure were studied: current, cumulative, and recency-weighted cumulative exposure. Cox proportional hazards models were used to examine the associations between psychosocial work exposures and cardiovascular mortality.

Results:

Within the 1976–2002 period, there were 19 264 cardiovascular deaths among men and 6181 among women. Low decision latitude, low social support, job strain, iso-strain, passive job, and high strain were associated with cardiovascular mortality. Most of these associations were also observed for IHD and stroke mortality. The comparison between the different exposure measures suggested that current exposure may be more important than cumulative (or past) exposure. The population fractions of cardiovascular mortality attributable to job strain were 5.64% for men and 6.44% for women.

Conclusions:

Psychosocial work exposures of the job strain model may play a role in cardiovascular mortality. The estimated burden of cardiovascular mortality associated with these exposures underlines the need for preventive policies oriented toward the psychosocial work environment.

Psychosocial work stressors and risk of mortality in Australia: analysis of data from the Household, Income and Labour Dynamics in Australia survey

Objective

To examine the association between exposures to psychosocial work stressors and mortality in a nationally representative Australian working population sample.

Methods

18 000 participants from the Household, Income and Labour Dynamics in Australia survey with self-reported job demands, job control, job security and fair pay psychosocial work stressors exposures at baseline were followed for up to 15 waves. Cox proportional hazards regression models were used to examine the association between psychosocial work stressors and mortality. Models were serially adjusted for each subgroup of demographic, socioeconomic, health and behavioural risk factors.

Results

Low job control was associated with a 39% increase in the risk of all-cause mortality (HR 1.39; 95% CI 1.04 to 1.85), controlling for demographic, socioeconomic, health and behavioural factors. A decreased risk of mortality was observed for workers with exposure to high job demands (HR 0.76; 95% CI 0.60 to 0.96, adjusted for gender and calendar), but the risk was attenuated after serially adjusting for socioeconomic status, health (HR=0.84; 95% CI 0.65 to 1.08) and behavioural (HR=0.79; 95% CI 0.60 to 1.04) factors. There did not appear to be an association between exposure to job insecurity (HR 1.03; 95% CI 0.79 to 1.33) and mortality, or unfair pay and mortality (HR 1.04; 95% CI 0.80 to 1.34).

Conclusions

Low job control may be associated with an increased risk of all-cause mortality. Policy and practice interventions that reduce the adverse impact of low job control in stressful work environments could be considered to improve health and decrease risk of mortality.

Decomposition of gendered income-related inequalities in multiple biological cardiovascular risk factors in a middle-aged population

Background

Socioeconomic inequalities in cardiovascular disease seem to widen or endure in Sweden. However, research on inequalities in antecedent cardiovascular risk factors (CVRFs), and particularly what underpins them, is scarce. The present study aimed 1) to estimate income-related inequalities in eight biological cardiovascular risk factors in Swedish middle-aged women and men; and 2) to examine the contribution of demographic, socioeconomic, behavioural and psychosocial determinants to the observed inequalities.

Methods

Participants (N = 12,481) comprised all 40- and 50-years old women and men who participated in the regional Västerbotten Intervention Programme in Northern Sweden during 2008, 2009 and 2010. All participants completed a questionnaire on behavioural and psychosocial conditions, and underwent measurements with respect to eight CVRFs (body mass index; waist circumference; total cholesterol; high-density lipoprotein cholesterol; low-density lipoprotein cholesterol; triglycerides; systolic/diastolic blood pressure; glucose tolerance). Data on cardiovascular risk, psychosocial and health behaviours were linked to national register data on income and other socioeconomic and demographic factors. To estimate income inequalities in each CVRF concentration indexes were calculated, and to examine the contribution of the underlying determinants to the observed inequalities a Wagstaff-type decomposition analysis was performed separately for women and men.

Results

Health inequalities ranged from small to substantial with generally greater magnitude in women. The highest inequalities among women were seen in BMI, triglycerides and HDL-cholesterol (Concentration index = − 0.1850; − 0.1683 and − 0.1479 respectively). Among men the largest inequalities were seen in glucose regulation, BMI and abdominal obesity (Concentration index = − 0.1661; − 0.1259 and − 0.1172). The main explanatory factors were, for both women and men socioeconomic conditions (contributions ranging from 54.8 to 76.7% in women and 34.0–72.6% in men) and health behaviours (contributions ranging from 6.9 to 20.5% in women and 9.2 to 26.9% in men). However, the patterns of specific dominant explanatory factors differed between CVRFs and genders.

Conclusion

Taken together, the results suggest that the magnitude of income-related inequalities in CVRFs and their determinants differ importantly between the risk factors and genders, a variation that should be taken into consideration in population interventions aiming to prevent inequalities in manifest cardiovascular disease.

Women's heart health at mid-life: what is the role of psychosocial stress?

BACKGROUND

Women in mid-life experience unique stressors, including transitions within their family roles, informal caregiving, job stress, and perceived discrimination. The impact of these stressors on cardiovascular health in women during mid-life is of growing interest in both the popular and scientific literature. The objective of this review is to summarize the recent literature on stress and cardiovascular health in mid-life women. We focus on stressors that are relevant to mid-life women, including social stress and discrimination, and long-term risk of CVD events and subclinical CVD measures.

METHODS

We systematically reviewed the literature published between January 2012 and April 2018 for studies examining stress in mid-life and either CVD endpoints or subclinical CVD outcomes. Eligible studies included at least one psychosocial stress exposure, a CVD or subclinical CVD outcome, and either included only female participants, reported sex-stratified analyses or tested for a sex*stress interaction.

RESULTS

We identified 37 studies published since 2012 that met our criteria and included women between the ages of 40 and 65, including 3 case-control studies, 15 cross-sectional studies, and 19 prospective cohort studies. Because clinical CVD events typically occur after age 65 in women, only 22 studies were available that evaluated stress and hard CVD events in samples with mid-life women. Results from these studies suggested an increased and significant risk of CVD due to stress. Of the 15 studies that included subclinical CVD outcomes, the majority showed that mid-life women experiencing greater levels of stress had more subclinical CVD, as indicated by carotid intima-media thickness, flow-mediated dilation and arterial stiffness; however, several studies reported null associations.

CONCLUSIONS

General life stress, including perceived stress and life events, in mid-life was significantly related to later-life CVD risk and mid-life subclinical CVD in the majority of studies published in the past six years. Job stress was inconsistently related to CVD risk in women, and fewer studies examined characteristics of other social roles, such as marriage, motherhood or caregiving. Perceived discrimination also was associated with CVD events and subclinical CVD in some samples of mid-life women. Further investigation into specific stressors relevant to women in mid-life, including caregiving and marital stress, are needed to understand the full extent to which life stress impacts CVD risk in mid-life women.

Lifestyle risk factors for cardiovascular disease and diabetic risk in a sedentary occupational group: the Galway taxi driver study

BACKGROUND

Taxi drivers are at increased risk of cardiovascular disease (CVD), something which persists after correcting for the overrepresentation of traditional risk factors for CVD in this cohort. The contribution of lifestyle risk factors to this residually elevated CVD risk remains under-evaluated.

AIMS

We aimed to determine the prevalence of lifestyle risk factors for CVD, self-reported medical risk factors for CVD, and future risk of type 2 diabetes amongst Irish taxi drivers.

METHODS

Male taxi drivers with no history of CVD and type 2 diabetes and working in Galway city in the west of Ireland were invited to participate. Physical activity levels, dietary patterns, anthropometry, smoking, hypertension, hypercholesterolaemia, and Finnish Diabetes Risk Score (FINDRISC) values were recorded in a cross-sectional manner.

RESULTS

41 taxi drivers (mean age 56.7 ± 9.8 years) participated. 37 % were insufficiently active based on self-report, although only 8 % objectively achieved 10, 000 steps per day. Mean modified Mediterranean diet score (mMDS) was 4.6 ± 2.2, and only 13 % of participants had a normal body mass index (BMI) or waist circumference (WC). Those who worked for taxi companies tended to have a higher BMI (p = .07) and WC (p = .04) by multivariable regression. 22 % were current smokers, although a quit rate of 72 % was observed amongst the 78 % of taxi drivers who had ever smoked. 25 % were at high or very high risk of future type 2 diabetes.

CONCLUSION

Lifestyle risk factors for CVD and dysglycaemia are prevalent amongst Irish taxi drivers.

Occupation and risk of sudden death in a United States community: a case-control analysis

OBJECTIVE

Work environment is said to influence cardiovascular risk. We assessed whether nature of occupation affects risk of sudden cardiac death (SCD) in the general population.

METHODS

In the ongoing, prospective Oregon Sudden Unexpected Death Study (catchment population 1 million), working-age SCD cases (18-65 years) were compared with controls who died from any cause. Usual occupation obtained from death certificates was classified using the US Census Bureau standard occupational classification descriptions and categorised as white collar, blue collar or homemaker. Odds ratio (OR) for SCD by occupation category was obtained and clinical profile of SCD cases was compared by occupation type.

RESULTS

Among SCD cases (n=646; 74% male) compared to controls (n=622; 73.6% male), the proportion of white collar workers was higher among male SCD cases (52.7% vs 43.7%; p=0.01); the difference in females was smaller (59.5% vs 55%; p=0.62). Adjusting for race and smoking status, male white collar workers had a higher risk of SCD compared to blue collar workers (OR=1.67, (1.26 to 2.23), p<0.001). A similar, non-significant trend was observed among females (OR 1.49 (0.81 to 2.75); p=0.20). White collar SCD cases were less likely to be current smokers (34.7% vs 45.3%, p=0.008), drug misusers (13.1% vs 18.5%) or have diabetes (21.4% vs 28.2%, both p=0.07) compared to blue collar workers. Other cardiac risk factors were similar.

CONCLUSIONS

A white collar occupation was associated with increased risk of SCD, when compared to blue collar occupations. Since differences in conventional risk factors did not explain this elevated risk, work-related behavioural and psychosocial stressors warrant a closer evaluation.