Subject demographics
| PBMCs | BAL cells | ||
| Controls | PBB | ||
| Subjects | 20 | 20 | 35 |
| Age years | 2.2 (0.3–4.5) | 1.6 (0.9–2.8) | 2.6 (1.3–4.4) |
| Males | 15 (75) | 16 (80) | 20 (57) |
| Culturable bacterial organisms n | N/A | 3 (3–4) | 3 (3–4) |
| Differential cell count ×106·L-1 | |||
| Total cell count | 8.90 (8.18–10.20) | 11.0 (9.05–12.2) | N/A |
| Neutrophils | 2.88 (1.69–3.72) | 3.63 (2.49–4.96) | N/A |
| Monocytes | 0.80 (0.59–1.02) | 1.09 (0.78–1.16) | N/A |
| Eosinophils | 0.34 (0.12–0.67) | 0.38 (0.19–0.59) | N/A |
| Lymphocytes | 4.82 (3.81–5.87) | 5.32 (4.04–6.60) | N/A |
| Immune cells % | |||
| Neutrophils | N/A | N/A | 23.0 (5.00–41.7) |
| Macrophages | N/A | N/A | 65.0 (32.6–89.0) |
| Lymphocytes | N/A | N/A | 7.60 (3.80–12.0) |
| Eosinophils | N/A | N/A | 0.00 (0.00–0.30) |
Data are presented as n, median (interquartile range) or n (%). PBMCs: peripheral blood mononuclear cells; BAL: bronchoalveolar lavage; PBB: protracted bacterial bronchitis; N/A: not applicable.