Emphysema, airflow limitation, and early age-related macular degeneration.

Published

Journal Article

OBJECTIVE: To describe the associations of lung function and emphysema, measured with spirometry and computed tomography (CT), with early age-related macular degeneration (AMD) in a sample of white, black, Hispanic, and Chinese subjects. METHODS: Three thousand three hundred ninety-nine persons aged 45 to 84 years residing in 6 US communities participated in a period cross-sectional study. Age-related macular degeneration was measured from digital retinal photographs at the second Multi-Ethnic Study of Atherosclerosis (MESA) examination. Forced expiratory volume in 1 second (FEV(1)) and FEV(1) to forced vital capacity (FVC) ratio were measured at the third or fourth MESA examination. Percent emphysema was measured from cardiac CT scans at baseline. Apical and basilar lung segments were defined as the cephalad or caudal regions of the lung on the cardiac CT scan. Logistic regression models were used to examine the association of lung function and structure with AMD, controlling for age, sex, and other factors. RESULTS: The prevalence of early AMD was 3.7%. Early AMD was not associated with FEV(1) (odds ratio [OR], 0.82; 95% confidence interval [CI], 0.58-1.15; P = .25), FEV(1):FVC ratio (OR, 0.92; 95% CI, 0.76-1.12; P = .43), percent emphysema (OR, 1.13; 95% CI, 0.91-1.40; P = .26), and apical-basilar difference in percent emphysema (OR, 1.14; 95% CI, 0.95-1.37; P = .17). Associations were stronger in smokers. Apical-basilar difference in percent emphysema was significantly associated with early AMD among those who ever smoked (OR, 1.28; 95% CI, 1.02-1.60; P = .03). Associations were not modified by race/ethnicity. CONCLUSIONS: Lung function and emphysema on CT scan were not cross-sectionally associated with AMD; this might be explained by the relatively low smoking exposure in this cohort.

Full Text

Duke Authors

Cited Authors

  • Klein, R; Knudtson, MD; Klein, BEK; Wong, TY; Cotch, MF; Barr, G

Published Date

  • April 2010

Published In

Volume / Issue

  • 128 / 4

Start / End Page

  • 472 - 477

PubMed ID

  • 20385944

Pubmed Central ID

  • 20385944

Electronic International Standard Serial Number (EISSN)

  • 1538-3601

Digital Object Identifier (DOI)

  • 10.1001/archophthalmol.2010.25

Language

  • eng

Conference Location

  • United States