CRP is associated with lung function decline in men but not women: A prospective study

Inga Sif Ólafsdóttir*, Thórarinn Gíslason, Vilmundur Gudnason, Bryndís Benediktsdóttir, Ísleifur Ólafsson, Thor Aspelund, Bjarni Thjódleifsson, Christer Janson

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

17 Citations (Scopus)

Abstract

Systemic inflammation is associated with impaired lung function. Studies, most cross-sectional, report a stronger association between systemic inflammation and lung function impairment in men than women. The aim was to evaluate gender differences in the longitudinal association between systemic inflammation and lung function. We used data from randomly chosen residents of Reykjavík, born 1940-54, who were investigated in three stages: Baseline (1973-75; 1983-85) and follow-up (2001-03). The participants (n = 1049, 574 women) had a mean age of 28 ± 6 years at baseline and mean follow-up time of 27 ± 4 years. At each stage lung function (FEV1 and FVC) and C-reactive protein (CRP) were evaluated. Change in FEV1 (p = 0.04) and FVC (p = 0.01) was associated with baseline CRP in men but not in women. In the multiple variable analysis, CRP at baseline was associated with a decline in FEV1 (-3.1 mL/year, 95% CI: -5.1, -0.99) and FVC (-2.5 mL/year, 95% CI: -4.4, -0.65) in men but not in women. Similarly during follow-up, change in CRP, standardised to 1SD, was associated with a decline in FEV1 (-0.19 mL/year, 95% CI: -0.30, -0.07) and FVC (-0.11 mL/year, 95% CI: -0.22, -0.01)) in men but not in women. This prospective study confirms a stronger association between systemic inflammation and lung function decline in men than in women. This may indicate a gender difference in the mechanisms of lung function decline.

Original languageEnglish
Pages (from-to)91-97
Number of pages7
JournalRespiratory Medicine
Volume107
Issue number1
DOIs
Publication statusPublished - Jan 2013

Bibliographical note

Funding Information:
This study was supported financially by Icelandic Research Council grant no. 050405011 and The Landspitali-University Hospital Research Fund . Special thanks to María Gunnbjörndóttir and Sue Pajuluoma for reviewing the article.

Other keywords

  • FEV
  • FEV decline
  • FVC
  • Gender difference
  • Lung function
  • Systemic inflammation

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