Total and differential cell counts in bronchoalveolar lavage fluid
| Nonsmokers | Smokers | ||
| Normal lung function | COPD | ||
| Subjects n | 9 | 14 | 18 |
| Total cell count ×105·mL−1 | 0.53±0.1 | 2.32±0.4* | 1.67±0.3* |
| Macrophages | |||
| ×105·mL−1 | 0.46±0.1 | 2.1±0.4* | 1.5±0.2* |
| % | 86±3 | 90±2 | 89±1 |
| Lymphocytes | |||
| ×105·mL−1 | 0.06±0.01 | 0.2±0.04 | 0.14±0.04 |
| % | 10±3 | 9±2 | 8±1 |
| Neutrophils | |||
| ×105·mL−1 | 0.01±0.00 | 0.02±0.00 | 0.03±0.01 |
| % | 3.2±2 | 0.9±0.3 | 2.7±1 |
Data presented as mean±sem, unless otherwise stated. COPD: chronic obstructive pulmonary disease. *: p<0.05 versus nonsmokers.