Correlations between various markers of airway inflammation and lung function
| Correlation | Visit 1 | Visit 6 | ΔVisit (6–1) |
| eNO versus % eosinophils | r=0.519 | r=0.548 | r=0.403 |
| p<0.001# | p<0.001# | p=0.002# | |
| eNO versus PD15 saline | r=−0.352 | r=−0.270 | r=−0.192 |
| p=0.003# | p=0.051 | p=0.187 | |
| eNO versus FEV1 % pred | r=−0.169 | r=0.021 | r=−0.252 |
| p=0.125 | p=0.870 | p=0.045# | |
| % eosinophils versus PD15 saline | r=−0.254 | r=−0.185 | r=0.045 |
| p=0.040# | p=0.204 | p=0.771 | |
| % eosinophils versus FEV1 % pred | r=−0.262 | r=0.015 | r=−0.585 |
| p=0.023# | p=0.913 | p<0.001# | |
| PD15 saline versus FEV1 % pred | r=0.420 | r=0.533 | r=−0.092 |
| p<0.001# | p<0.001# | p=0.529 |
eNO: exhaled nitric oxide
PD15 saline: cumulative provocative dose of saline causing a 15% fall in forced expiratory volume in one second (FEV1)