Study predicts new major depression symptoms
The study states that potentially long working hours and low workplace psychosocial safety climate (PSC) increase the risk of new major depression symptoms.

This study sought to assess the association between long working hours, psychosocial safety climate (PSC), work engagement (WE), and new major depression symptoms emerging over the next 12 months. PSC is the work climate supporting workplace psychological health.

At Time 1, there were 3921 respondents in the sample. Self-employed, casual temporary, unclassified, those with working hours <35, and participants with major depression symptoms at Time 1 were removed. The final sample was a population-based cohort of 1084 full-time Australian employees.

- Long working hours were not significantly related to new cases of major depression symptoms; however, when mild cases were removed, the 41–48 and ?55?long working hour categories were positively related to major depression symptoms.

- Low PSC was associated with a threefold increase in risk for new major depression symptoms. PSC was not related to long working hours, and long working hours did not mediate the relationship between PSC and new cases of major depression symptoms.

- The inverse relationship between PSC and major depression symptoms was stronger for males than females.

- Additional analyses identified that WE were positively related to long working hours.

- Long working hours (41–48 and ?55?hours) mediated a positive relationship between WE and major depression symptoms when mild cases of major depression were removed.

The results suggest that low workplace PSC and potentially long working hours (41–48; ?55?hours/week) increase the risk of new major depression symptoms. Furthermore, high WE may increase long working hours and subsequent major depression symptoms.

BMJ Open
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