Table 1 Changes in nucleated cells in BAL fluid during 40% oxygen exposure
| Â | Â | pre | 2 weeks | 4 weeks | 8 weeks | 16 weeks |
|---|---|---|---|---|---|---|
Macrophage (%) | 40% oxygen |  | 86.9 ± 4.0 | 88.8 ± 4.6 | 91.5 ± 3.4 | 92.8 ± 1.9 |
|  | Room air | 91.1 ± 2.3 | 89.8 ± 3.7 | 87.5 ± 5.0 | 92.4 ± 1.5 | 89.6 ± 3.6 |
Lymphocyte (%) | 40% oxygen |  | 12.1 ± 3.8 | 10.0 ± 4.6 | 7.0 ± 3.0 | 6.4 ± 1.9 |
|  | Room air | 8.1 ± 2.6 | 8.5 ± 2.4 | 10.9 ± 5.2 | 5.8 ± 0.8 | 9.2 ± 4.0 |
Neutrophil (%) | 40% oxygen |  | 1.1 ± 1.0 | 1.2 ± 0.8 | 1.5 ± 2.1 | 0.8 ± 0.8 |
|  | Room air | 0.8 ± 1.0 | 1.8 ± 2.1 | 1.5 ± 1.1 | 1.8 ± 0.8 | 1.2 ± 1.1 |