Longitudinal associations of perceived occupational challenges and depressive symptoms among middle-aged German workers

Background Studies have demonstrated that high job strain and low job satisfaction can lead to depression. However, less focus has been recorded on the effects of a worker’s perceived challenges related to their qualifications. Aims We aimed to investigate the association between perceived professional under-challenge or overload and depressive symptoms (also stratified by gender), based on nationally representative longitudinal data, thereby adding methodological novelty to previous cross-sectional research approaches. Method This study used longitudinal data from the nationally representative German Ageing Survey covering community-dwelling individuals aged 40–64 years. The analytic sample included 7487 observations from 4362 individuals, spanning 4 survey waves (2008–2017). Key variables were depressive symptoms (measured with the 15-item Center for Epidemiologic Studies Depression Scale), perceived occupational challenge (via self-report) and relevant time-varying covariates (age, marital status, net household income, self-rated health, chronic diseases). Linear fixed-effects regressions were used to analyse longitudinal associations. Results Fixed-effects regressions showed that transitions towards overload were significantly associated with increased depressive symptoms ( β = 1.39, P < 0.01), while transitions towards not being sufficiently challenged showed no significant associations. When stratified by gender, similar patterns were observed for men, with significant associations between overload and increased depressive symptoms ( β = 2.16, P = 0.004). Conclusion Our study indicates that changes towards job overload are linked to increased depressive symptoms in middle-aged men, emphasising the importance of managing work challenges and fostering a healthy work environment for employees’ mental health.