Figure 3From: Qualitative assessment of attributes and ease of use of the ELLIPTA™ dry powder inhaler for delivery of maintenance therapy for asthma and COPD COPD performance scores by subgroup defined by: A) COPD severity; B) age; C) prior DPI use. Note: COPD severity scores in A range from 1 (not at all severe) to 10 (extremely severe). COPD = chronic obstructive pulmonary disorder; DPI = dry powder inhaler.Back to article page