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Psychosocial stressors in the workplace are a cause of anxiety and depressive illnesses, suicide and family disruption. The present review synthesizes the evidence from existing systematic reviews published between 1990 and July 2011. We assessed the effectiveness of individual, organisational and mixed interventions on two outcomes: mental health and absenteeism. In total, 23 systematic reviews included 499 primary studies; there were 11 meta‐analyses and 12 narrative reviews. Meta‐analytic studies found a greater effect size of individual interventions on individual outcomes. Organisational interventions showed mixed evidence of benefit. Organisational programmes for physical activity showed a reduction in absenteeism. The findings from the meta‐analytic reviews were consistent with the findings from the narrative reviews. Specifically, cognitive‐behavioural …