Volume 139, Issue 4, Pages 752-763 (April 2011) COPD in Never Smokers  Bernd Lamprecht, MD, Mary Ann McBurnie, MD, William M. Vollmer, MD, Gunnar Gudmundsson, MD, FCCP, Tobias Welte, MD, Ewa Nizankowska-Mogilnicka, MD, FCCP, Michael Studnicka, MD, FCCP, Eric Bateman, MD, Josep M. Anto, MD, Peter Burney, MD, David M. Mannino, MD, FCCP, Sonia A. Buist, MD  CHEST  Volume 139, Issue 4, Pages 752-763 (April 2011) DOI: 10.1378/chest.10-1253 Copyright © 2011 The American College of Chest Physicians Terms and Conditions

Figure 1 Prevalence of GOLD stage II+ COPD among participants by smoking status, sex, and age (y). GOLD = Global Initiative for Obstructive Lung Disease; GOLD stage II+ = GOLD stages II, III, and IV. CHEST 2011 139, 752-763DOI: (10.1378/chest.10-1253) Copyright © 2011 The American College of Chest Physicians Terms and Conditions