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Depression and the risk of severe infections: prospective analyses on a nationwide representative sample.

Abstract：

BACKGROUND:Preliminary research suggests an association between depression and subsequent increased risk of infections, yet little is known on this topic. This study investigated the association between depression and risk of various types of infections, including temporal and dose-response relationships. METHODS:A prospective population-based study including 976,398 individuals, of whom 142,169 had a history of depression between 1995 and 2012, was conducted using linked Danish registries. Survival analyses were used to estimate the relative risk of infections among those with depression, compared with those without depression, while adjusting for gender and age. RESULTS:Depression was associated with increased risk of a wide range of infections [incidence rate ratio (IRR) = 1.61, 95% confidence interval (CI) = 1.49-1.74, P = 0.000, for any infection]. There was no evidence of a specific temporal effect but rather a general increased risk of infection subsequent to the onset of depression, as the risk during first year (IRR = 1.67, 95% CI = 1.25-2.22, P = 0.000) remained elevated for the ensuing 11 years and beyond (IRR = 1.61, 95% CI = 1.39-1.85, P = 0.000). Dose-response analyses revealed that the risk of infection increased by 59% (IRR = 1.59, 95% CI = 1.45-1.75, P = 0.000) following a single depressive episode and was elevated even further (IRR = 1.97, 95% CI = 0.92-4.22, P = 0.082) following four or more depressive episodes. However, results did not indicate a perfect linear association. CONCLUSIONS:Findings suggest the presence of depression may confer an increased risk of infection and that this increased susceptibility is not confined to a specific time period following the onset of depression. A dose-response relationship may be present, but more research is needed to further examine and confirm a link between depression and risk of infection.

journal_name

Int J Epidemiol

journal_title

International journal of epidemiology

authors

Andersson NW,Goodwin RD,Okkels N,Gustafsson LN,Taha F,Cole SW,Munk-Jørgensen P

doi

10.1093/ije/dyv333

subject

Has Abstract

pub_date

2016-02-01 00:00:00

pages

131-9

issue

eissn

0300-5771

issn

1464-3685

pii

dyv333

journal_volume

pub_type

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Depression and the risk of severe infections: prospective analyses on a nationwide representative sample.