Association of Nonobstructive Chronic Bronchitis With Respiratory Health Outcomes in Adults.

ABSTRACT:

Importance

Chronic bronchitis has been associated with cigarette smoking as well as with e-cigarette use among young adults, but the association of chronic bronchitis in persons without airflow obstruction or clinical asthma, described as nonobstructive chronic bronchitis, with respiratory health outcomes remains uncertain.

Objective

To assess whether nonobstructive chronic bronchitis is associated with adverse respiratory health outcomes in adult ever smokers and never smokers.

Design, setting, and participants

This prospective cohort study included 22 325 adults without initial airflow obstruction (defined as the ratio of forced expiratory volume in the first second [FEV1] to forced vital capacity [FVC] of <0.70) or clinical asthma at baseline. The National Heart, L

SUBMITTER: Balte PP 

PROVIDER: S-EPMC7052787 | biostudies-literature | 2020 May

REPOSITORIES: biostudies-literature