Mean (SE) baseline lung function, bronchodilator responses, and exhaled nitric oxide in the treated asthma (n=29), probable asthma (n=21) and chronic cough (n=46) groups and healthy children (n=62)
| Treated asthma | p value | Probable asthma | p value | Chronic cough | p value | Healthy children | |
|---|---|---|---|---|---|---|---|
| Rrs5=resistance at 5 Hz; Xrs5=reactance at 5 Hz; FENO=exhaled nitric oxide. | |||||||
| p values refer to comparison with healthy children (ANOVA). | |||||||
| Rrs5 (kPa/l.s) | 0.95 (0.04) | 0.002 | 1.01 (0.05) | <0.0001 | 0.87 (0.03) | NS | 0.83 (0.02) |
| Rrs5 (SD) | 0.5 (0.3) | NS | 1.1 (0.3) | 0.0003 | 0.1 (0.2) | NS | 0 (0.1) |
| Xrs5 (kPa/l.s) | −0.32 (0.03) | <0.0001 | −0.33 (0.03) | <0.0001 | −0.27 (0.01) | NS | −0.24 (0.01) |
| Xrs5 (SD) | −1.1 (0.4) | 0.002 | −1.5 (0.4) | 0.0002 | −0.4 (0.2) | NS | 0 (0.1) |
| ΔRrs5 (kPa/l.s) | −0.18 (0.03) | NS | −0.29 (0.03) | <0.0001 | −0.16 (0.01) | NS | −0.16 (0.01) |
| ΔRrs5%pred (%) | −20.6 (2.9) | NS | −34.8 (3.8) | <0.0001 | −19.4 (1.6) | NS | −19.6 (1.6) |
| ΔXrs5 (kPa/l.s) | −0.09 (0.02) | NS | −0.10 (0.02) | 0.01 | −0.06 (0.01) | NS | −0.06 (0.01) |
| ΔXrs5%pred (%) | −32.7 (5.9) | NS | −39.8 (6.9) | 0.01 | −26.1 (3.0) | NS | −23.5 (3.0) |
| FENO (ppb) | 7.7 (1.4) | NS | 22.1 (3.4) | <0.0001 | 9.2 (1.5) | 0.02 | 5.3 (0.4) |
| FENO (SD) | 0.4 (0.3) | NS | 2.6 (0.3) | <0.0001 | 0.8 (0.2) | 0.002 | 0 (0.1) |