Multiple regression model with FeNO as outcome
| Predictor | β | SE | Significance |
|---|---|---|---|
| Smoking | −3.079 | 1.534 | 0.049 |
| Exposure | 2.378 | 1.629 | 0.149 |
| SPT | 17.873 | 1.662 | <0.001 |
| Age (years) | 0.022 | 0.082 | 0.788 |
| VAS | 1.232 | 0.589 | 0.041 |
β=slope of single predictors.
FeNO, fraction of exhaled nitric oxide; SE, standard error; SPT, skin prick testing; VAS, visual analogue scale.