NLST-ACRIN participants stratified according to PLCOm2012 quintiles or airflow limitation (GOLD grade): a comparison of COPD prevalence (blue), lung cancer rate (orange), lung cancer deaths (black) and non-lung cancer deaths (red). NLST, National Lung Screening Trial; ACRIN, American College of Radiology Imaging Network; GOLD, Global Initiative for Obstructive Lung Disease; COPD, chronic obstructive pulmonary disease.