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Pneumothorax risk factors in smokers with and without chronic obstructive pulmonary disease
Journal article   Open access   Peer reviewed

Pneumothorax risk factors in smokers with and without chronic obstructive pulmonary disease

Brian D Hobbs, Marilyn G Foreman, Russell Bowler, Francine Jacobson, Barry J Make, Peter J Castaldi, Raúl San José Estépar, Edwin K Silverman, Craig P Hersh and COPDGene Investigators
Annals of the American Thoracic Society, Vol.11(9), pp.1387-1394
11/2014
DOI: 10.1513/AnnalsATS.201405-224OC
PMCID: PMC4298989
PMID: 25295410
url
https://doi.org/10.1513/AnnalsATS.201405-224OCView
Published (Version of record) Open Access

Abstract

The demographic, physiological, and computed tomography (CT) features associated with pneumothorax in smokers with and without chronic obstructive pulmonary disease (COPD) are not clearly defined. We evaluated the hypothesis that pneumothorax in smokers is associated with male sex, tall and thin stature, airflow obstruction, and increased total and subpleural emphysema. The study included smokers with and without COPD from the COPDGene Study, with quantitative chest CT analysis. Pleural-based emphysema was assessed on the basis of local histogram measures of emphysema. Pneumothorax history was defined by subject self-report. Pneumothorax was reported in 286 (3.2%) of 9,062 participants. In all participants, risk of prior pneumothorax was significantly higher in men (odds ratio [OR], 1.55; 95% confidence interval [CI], 1.08-2.22) and non-Hispanic white subjects (OR, 1.90; 95% CI, 1.34-2.69). Risk of prior pneumothorax was associated with increased percent CT emphysema in all participants and participants with COPD (OR, 1.04 for each 1% increase in emphysema; 95% CI, 1.03-1.06). Increased pleural-based emphysema was independently associated with risk of past pneumothorax in all participants (OR, 1.05 for each 1% increase; 95% CI, 1.01-1.10). In smokers with normal spirometry, risk of past pneumothorax was associated with non-Hispanic white race and lifetime smoking intensity (OR, 1.20 for every 10 pack-years; 95% CI, 1.09-1.33). Among smokers, pneumothorax is associated with male sex, non-Hispanic white race, and increased percentage of total and subpleural CT emphysema. Pneumothorax was not independently associated with height or lung function, even in participants with COPD. Clinical trial registered with www.clinicaltrials.gov (NCT00608764).
United States - epidemiology Pneumothorax - epidemiology Humans Middle Aged Risk Factors European Continental Ancestry Group - statistics & numerical data Male Tomography, X-Ray Computed Pulmonary Emphysema - diagnostic imaging Pulmonary Disease, Chronic Obstructive - epidemiology Pneumothorax - diagnostic imaging Smoking - epidemiology Sex Factors Female

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