Figures & data
Figure 1 Schematic illustration showing that the natural history of chronic obstructive pulmonary disease is characterized by a progressive increase in gas trapping measured as a progressive increase in residual volume.
Abbreviations: FEV1, forced expiratory volume in one second; FRC, functional residual capacity; IC, inspiratory capacity; TLC, total lung capacity; VC, vital capacity; RV, residual volume; L, liters.
![Figure 1 Schematic illustration showing that the natural history of chronic obstructive pulmonary disease is characterized by a progressive increase in gas trapping measured as a progressive increase in residual volume.](/cms/asset/85c85dcb-eff7-41b1-a9f2-e65c932000df/dcop_a_21625_f0001_b.jpg)
Figure 2 Effect of active treatments (differences compared with placebo) on trough FEV1 at week 26.
Abbreviation: FEV1, forced expiratory volume in one second.
![Figure 2 Effect of active treatments (differences compared with placebo) on trough FEV1 at week 26.](/cms/asset/9c6428e1-f74c-4039-a362-512dca741323/dcop_a_21625_f0002_b.jpg)
Figure 3 Range of average rate of decline of FEV1 in patients with chronic obstructive pulmonary disease according to severity of airflow obstruction.
Abbreviation: FEV1, forced expiratory volume in one second.
![Figure 3 Range of average rate of decline of FEV1 in patients with chronic obstructive pulmonary disease according to severity of airflow obstruction.](/cms/asset/78e95906-9dda-4bbb-98dc-9375fdbce47e/dcop_a_21625_f0003_b.jpg)
Figure 4 Comparison of effects of indacaterol and formoterol on FEV1 and inspiratory capacity as percent change in unadjusted mean values from predose.
Abbreviation: FEV1, forced expiratory volume in one second.
![Figure 4 Comparison of effects of indacaterol and formoterol on FEV1 and inspiratory capacity as percent change in unadjusted mean values from predose.](/cms/asset/e125290a-60f6-408f-92b7-22fe58408c5a/dcop_a_21625_f0004_b.jpg)
Figure 5 Changes in FRC, TLC, and RV at hour 4 after administration.
Abbreviations: FRC, functional residual capacity; TLC, total lung capacity; RV, residual volume.
![Figure 5 Changes in FRC, TLC, and RV at hour 4 after administration.](/cms/asset/84e182a1-0be3-43c8-a0d2-5010a9673c28/dcop_a_21625_f0005_b.jpg)