Patients (%) with COPD symptoms*
| Night | Morning | Day | |
| Prevalence (any symptom) | |||
| ≥3 times past week | 43 | 57 | 57 |
| ≥3 times typical week | 48 | 62 | 61 |
| Patients with ≥1 symptom | 62 | 77 | 79 |
| Severity (past week) | |||
| No symptoms | 48 | 25 | 22 |
| Mild/moderate | 45 | 65 | 68 |
| Severe/very severe | 6 | 9 | 9 |
*to nearest %