Cancer incidence in a cohort of Swedish merchant seafarers between 1985 and 2011

Purpose Lung cancer, mesothelioma and several lifestyle-associated cancer forms have been reported more common in merchant seafarers. However, few studies reflect recent occupational settings and women seafarers are usually too scarce for meaningful analyses. We conducted a study on cancer incidence between 1985 and 2011 in a Swedish cohort consisting of male and female seafarers. Methods All seafarers in the Swedish Seafarers’ Register with at least one sea service between 1985 and 2011 and a cumulated sea service time of ≥ 30 days (N = 75,745; 64% men, 36% women; 1,245,691 person-years) were linked to the Swedish Cancer Register and followed-up until 31 December 2011. Standardized incidence ratios (SIR) were calculated with the general population as reference. Results There were 4159 cancer cases in total, with 3221 among men and 938 among women. Male seafarers had an increased risk of total cancer (SIR 1.05; 95% CI 1.01–1.09), lung cancer (SIR 1.51; 95% CI 1.35–1.67) and urinary bladder cancer (SIR 1.17; 95% CI 1.02–1.33). Several lifestyle-associated cancer forms were more common in men. Previous work on tankers was associated with leukaemia (SIR 1.41; 95% CI 1.00–1.86). The risk of cancer decreased with a start as a male seafarer after 1985, with a significant trend for total cancer (P < 0.001), lung cancer (P = 0.001) and, for tanker seafarers, leukaemia (P = 0.045). Women seafarers had an increased risk of lung cancer (SIR 1.54; 95% CI 1.23–1.87) but the risk of total cancer was not increased (SIR 0.83; 95% CI 0.78–0.89). Conclusions In this cohort of merchant Swedish seafarers 1985–2011, the risk of total cancer was increased in men but not in women compared to the general population. Lung cancer was increased in both genders. The risk of cancer seems to decrease over the last decades, but better exposure assessments to occupational carcinogens and longer observation times are needed.

Work changes and employee age, maladaptive coping expectations, and well-being: a Swedish cohort study

Purpose Older workers are expected to suffer more from work changes than younger ones, but empirical evidence is lacking. Negative responses to work changes may result rather from maladaptive coping expectations. This study examined possible age differences in job and life satisfaction, and sleep disturbances, after work changes (voluntary and involuntary job changes, reorganizations) and the moderating role of maladaptive coping expectations. Methods Four biennial waves from the Swedish Longitudinal Occupational Survey of Health (SLOSH) including respondents who participated in all four waves (n = 3084). We used multilevel path analyses to estimate direct and moderated relationships between work changes and outcomes. Results Involuntary job changes were associated with lower job and life satisfaction and more sleep disturbances. Reorganizations were only associated with lower job satisfaction. Older employees were more satisfied with their jobs and lives than younger employees and experienced more sleep disturbances. After involuntary job changes, older employees had similar (lower) levels of well-being as younger ones, but they reported more sleep disturbances when having experienced reorganizations. Maladaptive coping expectations were related to lower job and life satisfaction and more sleep disturbances. Employees with maladaptive coping expectations reported more sleep disturbances after involuntary job changes and reorganizations. Conclusion Our results suggest that there are few age differences in well-being after work changes. Employee well-being seems to mostly depend on maladaptive coping expectations. Organizations aiming to prepare employees for job changes and reorganizations could focus their efforts on employees with maladaptive expectations rather than on older ones.

Influence of geographical latitude on vitamin D status: cross-sectional results from the BiomarCaRE consortium

Even though sunlight is viewed as the most important determinant of 25-hydroxyvitamin D (25[OH]D) status, several European studies have observed higher 25(OH)D concentrations among north-Europeans than south-Europeans. We studied the association between geographical latitude (derived from ecological data) and 25(OH)D status in 6 European countries by using harmonized immunoassay data from 81,084 participants in the Biomarkers for Cardiovascular Risk Assessment in Europe (BiomarCaRE) project (male sex 48.9%; median age 50.8 years; examination period 1984 to 2014). Quantile regression models, adjusted for age, sex, decade and calendar week of sampling, and time from sampling to analysis, were used for between-country comparisons. Up until the median percentile, the ordering of countries by 25(OH)D status (from highest to lowest) was as follows: Sweden (at 65.6 to 63.8 oN), Germany (at 48.4 oN), Finland (at 65.0 to 60.2 oN), Italy (at 45.6 to 41.5 oN), Scotland (at 58.2 to 55.1 oN), and Spain (at 41.5 oN). From the 75th percentile and upwards, Finland had higher values than Germany. As an example, using the Swedish cohort as comparator, the median 25(OH)D concentration was 3.03, 3.28, 5.41, 6.54, and 9.28 ng/mL lower in the German, Finnish, Italian, Scottish, and Spanish cohort, respectively (P-value < 0.001 for all comparisons). The ordering of countries was highly consistent in subgroup analyses by sex, age, and decade and season of sampling. In conclusion, we confirmed the previous observation of a north-to-south gradient of 25(OH)D status in Europe, with higher percentile values among north-Europeans than south-Europeans.

Gender Differences in the Work and Home Spheres for Teachers, and Longitudinal Associations with Depressive Symptoms in a Swedish Cohort

The high level of stress among teachers is a frequently reported problem globally but less is known about how demands and resources among teachers affect depressive symptoms, and to what extent gender differences in these conditions can explain potential differences in depressive symptoms. The present study investigated gender differences in teachers’ self-reported depressive symptoms, and differences in their demands and resources in both work and home spheres. Associations between demands and resources, respectively, and depressive symptoms as well as gender differences in these associations were examined. Results from univariate and parallel growth modelling (N = 1,022), using data from six time points (2008 to 2018), found higher levels of depressive symptoms, higher emotional and quantitative work demands, and more time doing unpaid work among female teachers, whereas male teachers reported more time on leisure activities. Emotional and quantitative work demands were associated with depressive symptoms at baseline, and these associations also developed in parallel over time. Leisure time had a negative association with depressive symptoms at baseline. There were no gender differences in the strength of these associations. Findings suggest that gender differences in teachers’ depressive symptoms could be attributable to women’s greater demands in the work sphere and fewer resources in the home sphere than men as opposed to their being more vulnerable to workplace stressors.

Waning infant pertussis during COVID-19 pandemic

Measures to reduce the spread of COVID-19 have been associated with reduction in other respiratory infections. Results of a national Swedish cohort study of infant pertussis during April 2020–September 2021 were compared with those during January 2014–March 2020. The number of pertussis cases decreased significantly during the COVID-19 pandemic, from an average of 21 infant cases per quarter of a year before the pandemic to an average of 1 case per quarter during the pandemic. Swedish strategies to mitigate the spread of COVID-19 seem to have had an impact on pertussis incidence in infants.

What social determinants outside paid work are related to development of mental health during life? An integrative review of results from the Northern Swedish Cohort

Background Despite global increase in burden of mental health conditions, longitudinal studies on factors related to development of mental health are scarce. Particularly integrated understanding of how factors at each level of ecological system interact to influence mental health of individuals during their life is missing. Both work and outside work (life beyond work) spheres are two important areas in human life which can have independent effects on mental health of individuals. In this integrative review, we aimed to synthesis findings about social determinants outside paid work that are related to development of mental health during life in a 27-year prospective Swedish Cohort study by using Bronfenbrenner’s Ecological Systems Theory. Methods The material for this paper consists of all mental health related papers within Northern Swedish Cohort. Papers related to outside paid work exposures of life circumstances were selected. An integrative review was conducted on 27 papers and deductive qualitative content analysis in relation to Bronfenbrenner ecological framework was performed to identify the main themes. Results The results of this review showed that class structures and gender order at macro-level permeated into all other levels and finally became embodied in the individuals as symptoms of mental health during life. At the “exo-level” neighbourhood disadvantage was related to mental ill-health of individuals. The importance of parental interaction with other settings, like school, for mental health of individuals was highlighted at “meso-level”. At “micro-level” poor social relationships; social and material adversities and inequality in gender relations during adult life were related to mental ill-health. Conclusion We found mental health of individuals to be related to both unique and common factors manifesting at different socio-ecological levels. Social structures at the macro-level namely class structures and gender order permeate all other levels and eventually become embodied in the individuals as symptoms of mental health during life. Interventions addressing gender and class related inequalities might be of importance for improving mental health of individuals during their life.