Respiratory Exacerbations and Lung Function Decline in People with Smoking History and Normal Spirometry

医学 肺活量测定 肺功能 呼吸系统 吸烟史 重症监护医学 内科学 哮喘
作者
Spyridon Fortis,Matthew Strand,Surya P. Bhatt,Patrick Ten Eyck,Linder Wendt,Trisha M. Parekh,MeiLan K. Han,John E. Hokanson,Gregory L. Kinney,Jeffrey L. Curtis,Russell P. Bowler,Emily S. Wan,Ken M. Kunisaki,Chris H. Wendt,Elizabeth A. Regan,Mark Dransfield,James D. Crapo,Edwin K. Silverman,Alejandro P. Comellas
出处
期刊:American Journal of Respiratory and Critical Care Medicine [American Thoracic Society]
被引量:1
标识
DOI:10.1164/rccm.202401-0023oc
摘要

The impact of respiratory exacerbation on chronic obstructive pulmonary disease (COPD) is well established. The effects of respiratory exacerbations in people with cigarette smoking but normal spirometry are unknown. To assess the association of respiratory exacerbations with lung function decline and mortality in people with normal spirometry and current or former cigarette smoking history. We analyzed data from COPDGene participants with ≥10 pack-years cigarette smoking and normal spirometry at enrollment (Visit 1) defined as post-bronchodilator forced expiratory volume in 1 second (FEV1)/forced vital capacity (FVC) ≥lower limit of normal (LLN) and FEV1 ≥LLN. We examined whether respiratory exacerbations occurring between Visits 1 and the 5-year follow-up visit (Visit 2) were associated with FEV1 decline, and all-cause mortality. Among 2,939 participants with cigarette smoking history and normal lung function at Visit 1, each additional exacerbation between visit 1 and 2 was associated with a 2.96 ml/year FEV1 decline (95%CI 1.81 to 4.12; P<0.001) at Visit 2. Experiencing ≥1 severe exacerbation between Visits 1 and 2 was associated with 14.6 ml/year FEV1 decline relative to those with no severe exacerbations (95% CI 8.56 to 20.6; P<0.001). Individuals with ≥1 severe exacerbation between Visits 1 and 2 had increased mortality compared to those with no severe exacerbations (17.1% vs. 9.8%; adjusted hazard ratio 1.97;95% CI 1.40 to 2.77; P<0.001). Respiratory exacerbations in people with cigarette smoking but normal spirometry were associated lung function decline. Experiencing a severe respiratory exacerbation was associated with increased mortality.
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