Fig. 1From: Principal component analysis of flow-volume curves in COPDGene to link spirometry with phenotypes of COPDThe mean MEFVC shapes per GOLD stage in panel A, the mean MEFVC shapes per CT-based phenotype in panel B and the mean MEFVC shapes per number of abnormalities on CT in panel C. B, bronchial wall thickening; E, emphysema; GOLD, Global Initiative for Chronic Obstructive Lung Disease; MEFVC, maximal expiratory flow-volume curve; S, small airways diseaseBack to article page