Clinical Burden of Chronic Obstructive Pulmonary Disease in Patients with Suboptimal Peak Inspiratory Flow

<div>Mean percent predicted (a) FEV<sub>1</sub> and (b) FVC in participants with oPIF and sPIF against the medium-low resistance DPIs. CI = confidence interval; FEV<sub>1</sub> = forced expiratory volume in 1 second; FVC = forced vital capacity; IPR = ipratropium; oPIF = optimal PIF; PIF = peak inspiratory flow; sPIF = suboptimal PIF.</div>

Canadian Respiratory Journal

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Figure 3

Figure 3: Clinical Burden of Chronic Obstructive Pulmonary Disease in Patients with Suboptimal Peak Inspiratory Flow 