EBC NO2−/NO3− level μmol per mg proteins# | FeNO level ppb¶ | |||||||
n | Estimate | sd | p-value | n | Estimate | sd | p-value | |
All subjects | ||||||||
Eosinophil cells per mm3 | 492 | 0.14 | 0.09 | 0.10 | 505 | 0.25 | 0.04 | <0.0001 |
FeNO level ppb | 510 | 0.14 | 0.08 | 0.10 | ||||
Non-sensitised subjects | ||||||||
Eosinophil cells per mm3 | 204 | 0.15 | 0.13 | 0.3 | 208 | 0.15 | 0.05 | 0.01 |
FeNO level ppb | 215 | −0.17 | 0.15 | 0.3 | ||||
Sensitised subjects | ||||||||
Eosinophil cells per mm3 | 288 | 0.15 | 0.11 | 0.2 | 297 | 0.31 | 0.06 | <0.0001 |
FeNO level ppb | 295 | 0.21 | 0.10 | 0.04 |
#: adjusted for age, sex, smoking, ambient ozone concentration, asthma and centre; ¶: adjusted for age, sex, smoking, height, asthma and centre (generalised estimating equation linear regression methods).