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Explaining the social gradient in long-term sickness absence: a prospective study of Danish employees
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    Explaining the social gradient: The challenges of mediation

    Dear Editor

    In this issue of the journal, a study by Christensen et al. reported on how the social gradient in long-term sickness was explained by a number of risk factors related to work environment and health behavior in a sample of Danish employees.[1]

    I agree with Christensen et al. that it is important to examine what mediates (or explains) social gradients in health: Not only from a scholarly inter...

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    Conflict of Interest:
    None declared.