Figure 3.

Graphic representation of all subjects with airway obstruction^a at screening spirometry (n=937) according to the presence of post-bronchodilator airway obstruction and/or BD reversibility.^b

Notes: (A) Subjects with post-BD airway obstruction, (B) subjects with a significant BD response, and (C) subjects with normal post-BD FEV₁/FVC. ^aFEV₁/FVC ratio <0.70; ^bchange in FEV₁ >0.200 L and >12%.

Abbreviations: BD, bronchodilator; FEV₁, forced expiratory volume in one second; FVC, forced vital capacity.