Figure 4From: Observational study to characterise 24-hour COPD symptoms and their relationship with patient-reported outcomes: results from the ASSESS studyPrevalence of any COPD symptoms (A) overall and (B) during each part of the 24-hour day, according to COPD severity. n = patients in each group based on available data. COPD, chronic obstructive pulmonary disease.Back to article page