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Characteristics of patients with chronic obstructive pulmonary disease, according to disease severity
| Variable | Global initiative for chronic obstructive lung disease stage
|
||
|---|---|---|---|
| Stage I (n=8) |
Stage II (n=24) |
Stage III/IV (n=10) |
|
| Age, mean (years) | 48.4 | 48.5 | 56.7 |
| Pack-years, mean | 60.8 | 51.7 | 56.7 |
| Chronic bronchitis, n (%) | 3 (37.5) | 11 (45.8) | 4 (40) |
| Wheezes, n (%) | 3 (37.5) | 18 (75) | 7 (70) |
| Dyspnea, n (%) | 3 (37.5) | 23 (95.8) | 8 (80) |
