Chronic obstructive pulmonary disease (COPD) patients are thought to have limited bronchodilator response, determined by changes in forced expiratory volume in 1s (FEV1). In this study, we assessed bronchodilator response in patients with COPD using not only FEV1 but also changes in lung volume expressed as forced vital capacity (FVC) and inspiratory capacity (IC). We also evaluated the speed of onset of bronchodilation.
Methods: Data were from 2 randomized, double-blind, placebo-controlled studies (6-months [NCT00206154]; 12-months [NCT00206167]) in patients with moderate to very severe COPD.
Treatments: twice daily budesonide/formoterol pressurized metered-dose inhaler (pMDI) 320/9μg, budesonide/formoterol pMDI 160/9μg, formoterol dry powder inhaler (DPI) 9μg,...
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