Objective: There is a lack of evidence concerning the prospective effect of cumulative exposure to psychosocial job stressors over time on mental ill-health. This study aimed to assess whether cumulative exposure to poor quality jobs places employees at risk of future common mental disorder.
Methods: Data were from the Personality and Total Health Through Life project (n=1279, age 40-46 at baseline). Data reported on the cumulative exposure to multiple indicators of poor psychosocial job quality over time (ie, a combination of low control, high demands and high insecurity) and future common mental disorder (ie, depressive and/or anxiety symptom scores above a validated threshold) 12 years later. Data were analysed using logistic regression models and controlled for potential confounders across the lifespan.
Results: Cumulative exposure to poor-quality work (particularly more secure work) on multiple occasions elevated the risk of subsequent common mental disorder, independent of social, health, verbal intelligence and personality trait confounders (OR=1.30, 95% CI 1.06 to 1.59).
Conclusions: Our findings show that cumulative exposure to poor psychosocial job quality over time independently predicts future common mental disorder-supporting the need for workplace interventions to prevent repeated exposure of poor quality work.
Keywords: mental health; occupational health practice.
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