The overall goal of this ongoing study is to characterize the WTC‐related lower airway disorders, to investigate newly developed obesity‐related imaging markers that may be associated with unfavorable disease expression and functional outcomes, and assess their interaction with WTC occupational exposure level. The WTC Pulmonary Evaluation Unit Chest CT Imaging Archive, a large database with more than 3000 chest CT images on 1700 WTC workers, operational since February 2016, will be utilized for this study. This study will characterize the WTC‐related lower airway diseases and their most important adverse prognostic risk factors, and evaluate lung function and imaging longitudinal trajectories.
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