25 Dec 2012

Elevated C-Reactive Protein Levels, Psychological Distress, and Depression in 73 131 Individuals (Arch Gen Psychiatry, abstract, edited)

[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 Ørsted, MD; Sune Fallgaard Nielsen, MScEE, PhD; Børge Grønne 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 × 10−8 to P = 4 × 10−105 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 × 10−8 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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