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- Figure 1.
Subgroup Analysis by COPD Severity
COPD=chronic obstructive pulmonary disease; LS=least squares; NS=nonsignificant; SE=standard error; TDI=Transition Dyspnea Index.
Reproduced with permission from DA Mahler, MD.
- Figure 2.
FEV1 Area Under the Curve
AUC0–4h=area under the curve from 0 to 4 hours; FEV1=forced expiratory volume in 1 second; LS=least squares; SE=standard error.
Reproduced with permission from DA Mahler, MD.
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