Bronchoalveolar lavage (BAL) cell count according to age
| Total population n (%) | <3 years# (mean±sd) | 3–6 years¶ (mean±sd) | > 6 years+ (mean±sd) | n | p-value | |
| Total cells (103 per mL) | 255 (175) | 341±219 | 244±109 | 166±95.8 | 103 | <0.001 |
| Macrophages | 83.6 (13.9) | 82.4±16.3 | 83.4±10.8 | 85.1±13.2 | 105 | 0.43 |
| Lymphocytes | 10.5 (6.47) | 10.2±6.12 | 13.7±7.80 | 8.57±4.96 | 105 | <0.01 |
| Neutrophils | 4.48 (12.3) | 7.44±16.4 | 2.19±2.75 | 2.73±10.4 | 105 | 0.0503 |
| Eosinophils | 1.00 (3.83) | 0.131±0.314 | 0.269±0.992 | 2.50±6.16 | 105 | <0.01 |
Data were available for 103 patients. #: n=41; ¶: n=25; +: n=37.