Eosinophil cationic protein (ECP) assay using exhaled breath. The threshold for detection in the assay was 50.7 pg/ml
| Patient | Mean ECP (pg/ml) | Sputum Eosinophils (%) |
|---|---|---|
| Child 1 | 65 | (unknown) |
| Child 2 | 505 | 18.96 |
| Child 3 | 134 | 6.2 |
| Child 4 | 1113 | 0.21 |
| Child 5 | 1307 | 0.0 |