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Arch Gen Psychiatry. Elevated C-Reactive Protein Levels, Psychological Distress, and Depression in 73 131 Individuals

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  • Arch Gen Psychiatry. Elevated C-Reactive Protein Levels, Psychological Distress, and Depression in 73 131 Individuals

    [Source: Archives of General Psychiatry, full page: (LINK). Abstract, edited.]
    Original Article| ONLINE FIRST

    Elevated C-Reactive Protein Levels, Psychological Distress, and Depression in 73 131 Individuals


    Marie Kim Wium-Andersen, MD; David Dynnes ?rsted, MD; Sune Fallgaard Nielsen, MScEE, PhD; B?rge Gr?nne Nordestgaard, MD, DMSc

    Arch Gen Psychiatry. 2012;():1-9. doi:10.1001/2013.jamapsychiatry.102. Published online December 24, 2012



    ABSTRACT

    Context

    The pathogenesis of depression is not fully understood, but studies suggest that low-grade systemic inflammation contributes to the development of depression.


    Objective

    To test whether elevated plasma levels of C-reactive protein (CRP) are associated with psychological distress and depression.


    Design

    We performed cross-sectional and prospective analyses of CRP levels in 4 clinically relevant categories using data from 2 general population studies.


    Setting

    The Copenhagen General Population and the Copenhagen City Heart studies.


    Participants

    We examined 73 131 men and women aged 20 to 100 years.


    Main Outcome Measures

    We ascertained psychological distress with 2 single-item self-reports and depression using self-reported antidepressant use, register-based prescription of antidepressants, and register-based hospitalization with depression.


    Results

    In cross-sectional analyses, increasing CRP levels were associated with increasing risk for psychological distress and depression (P = 3 ? 10<SUP>−8</SUP> to P = 4 ? 10<SUP>−105</SUP> for trend). For self-reported use of antidepressants, the odds ratio was 1.38 (95% CI, 1.23-1.55) for CRP levels of 1.01 to 3.00 mg/L, 2.02 (1.77-2.30) for 3.01 to 10.00 mg/L, and 2.70 (2.25-3.25) for greater than 10.00 mg/L compared with 0.01 to 1.00 mg/L. For prescription of antidepressants, the corresponding odds ratios were 1.08 (95% CI, 0.99-1.17), 1.47 (1.33-1.62), and 1.77 (1.52-2.05), respectively; for hospitalization with depression, 1.30 (1.01-1.67), 1.84 (1.39-2.43), and 2.27 (1.54-3.32), respectively. In prospective analyses, increasing CRP levels were also associated with increasing risk for hospitalization with depression (P = 4 ? 10<SUP>−8</SUP> for trend).


    Conclusions

    Elevated levels of CRP are associated with increased risk for psychological distress and depression in the general population.
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