Median (range) cell counts per mm2 in airway smooth muscle
| Smokers with COPD | Smokers with normal lung function | Non-smokers | |
|---|---|---|---|
| *p<0.05, †p<0.005 compared with non-smokers. | |||
| Neutrophils | 53 (19–93)† | 23 (0–114)* | 9 (0–38) |
| CD8+ cells | 19 (0–33)* | 4 (0–20) | 0 (0–15) |
| CD4+ cells | 3 (0–53) | 6 (0–39) | 3 (0–15) |
| Mast cells | 98 (20–270) | 90 (0–225) | 86 (57–253) |
| Macrophages | 8 (0–35) | 26 (0–55) | 0 (0–59) |