The online version of this article (doi:10.1007/s00420-017-1277-0) contains supplementary material, which is available to authorized users.
Depression is a global health concern. High job demands, low job control, and the combination (high strain) are associated with depression. However, few longitudinal studies have investigated changed or repeated exposure to demands and control related to depression. We investigated how trajectories of exposure to job demands and control jointly influence subsequent depression.
We included 7949 subjects from the Swedish Longitudinal Occupational Survey of Health, who completed questionnaires of perceived job demands and control, and depressive symptoms from 2006 to 2014. None of them were depressed between 2006 and 2012. Univariate and joint group-based trajectory models identified groups with similar development of demands and control across 2006–2012. Logistic regression estimated the risk for symptoms of major depression in 2014 according to joint trajectory groups.
The joint trajectory model included seven groups, all with fairly stable levels of demands and control over time. Subjects in the high strain and active (high demands and high control) trajectories were significantly more likely to have subsequent major depressive symptoms compared to those having low strain, controlling for demographic covariates (OR 2.15; 95% Cl 1.24–3.74 and OR 2.04; 95% CI 1.23–3.40, respectively). The associations did not remain statistically significant after adjusting for previous depressive symptoms in addition to demographic covariates.
The results indicate that the levels of job demands and control were relatively unchanged across 6 years and suggest that long-term exposure to a high strain or active job may be associated with increased risk for subsequent depression.
Online resource Fig. 1 Flowchart of participants in the SLOSH study between 2006 and 2014, according to inclusion and exclusion criteria of this study (PDF 1057 kb)
Online resource Fig. 3 Trajectory model of job demands in the SLOSH study. Mean level of job demands across six years according to trajectory group, and the proportion of individuals in each group (EPS 2175 kb)
Online resource Fig. 4 Trajectory model of job control in the SLOSH study. Mean level of job control across six years according to trajectory group, and the proportion of individuals in each group (EPS 2158 kb)
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- Trajectories of job demands and control: risk for subsequent symptoms of major depression in the nationally representative Swedish Longitudinal Occupational Survey of Health (SLOSH)
Julia K. Åhlin
Linda L. Magnusson Hanson
- Springer Berlin Heidelberg
International Archives of Occupational and Environmental Health
Print ISSN: 0340-0131
Elektronische ISSN: 1432-1246