Inflammatory markers and longitudinal lung function decline in the elderly

Rui Jiang, Gregory L. Burke, Paul L. Enright, Anne B. Newman, Helene G Margolis, Mary Cushman, Russell P. Tracy, Yuanjia Wang, Richard A. Kronmal, R. Graham Barr

Research output: Contribution to journalArticle

55 Scopus citations

Abstract

Longitudinal studies examining associations of the inflammatory markers fibrinogen and C-reactive protein (CRP) with lung function decline are sparse. The authors examined whether elevated fibrinogen and CRP levels were associated with greater longitudinal lung function decline in the elderly. The Cardiovascular Health Study measured fibrinogen and CRP in 5,790 Whites and African Americans from four US communities aged 65 years or older in 1989-1990 or 1992-1993. Spirometry was performed in 1989-1990 and 4, 7, and 16 years later. Fibrinogen and CRP were inversely associated with lung function at baseline after adjustment for multiple potential confounders. In mixed models, the rate of decline in forced expiratory volume in 1 second (FEV 1)/forced vital capacity (FVC) ratio with increasing age was faster among those with higher baseline fibrinogen (-0.032%/year per standard deviation higher fibrinogen (95% confidence interval: -0.057, -0.0074)) but not among those with higher CRP (-0.0037%/year per standard deviation higher CRP (95% confidence interval: -0.013, 0.0056)). Longitudinal analyses for FEV1 and FVC yielded results in the direction opposite of that hypothesized, possibly because of the high mortality rate and strong inverse association of FEV1 and FVC but not FEV1/FVC with mortality. An alternative approach to missing data yielded similar results. In conclusion, higher levels of fibrinogen, but not CRP, independently predicted greater FEV1/FVC decline in the elderly.

Original languageEnglish (US)
Pages (from-to)602-610
Number of pages9
JournalAmerican Journal of Epidemiology
Volume168
Issue number6
DOIs
StatePublished - Sep 2008

Keywords

  • Aged
  • Biological markers
  • C-reactive protein
  • Fibrinogen
  • Forced expiratory volume
  • Inflammation
  • Spirometry
  • Vital capacity

ASJC Scopus subject areas

  • Epidemiology

Fingerprint Dive into the research topics of 'Inflammatory markers and longitudinal lung function decline in the elderly'. Together they form a unique fingerprint.

  • Cite this

    Jiang, R., Burke, G. L., Enright, P. L., Newman, A. B., Margolis, H. G., Cushman, M., Tracy, R. P., Wang, Y., Kronmal, R. A., & Barr, R. G. (2008). Inflammatory markers and longitudinal lung function decline in the elderly. American Journal of Epidemiology, 168(6), 602-610. https://doi.org/10.1093/aje/kwn174