Association between lung function parameters and exposure adjusted for current smoking, age, sex, height and atopy
| All | p-value | Nonatopics | p-value | Atopics | p-value | |
| FEV1 | -0.004 | 0.60 | -0.017 | 0.08 | 0.012* | 0.27 |
| FVC | 0.015 | 0.08 | 0.010 | 0.37 | 0.020 | 0.10 |
| FEV1/FVC | -0.321 | 0.004 | -0.543 | 0.0002 | -0.088* | 0.61 |
| PEF | -0.026 | 0.31 | -0.088 | 0.01 | 0.045* | 0.22 |
| MMEF | -0.037 | 0.03 | -0.071 | 0.003 | 0.0014* | 0.95 |
| MEF75 | -0.043 | 0.13 | -0.109 | 0.01 | 0.032* | 0.42 |
| MEF50 | -0.037 | 0.07 | -0.076 | 0.01 | 0.010* | 0.72 |
| MEF25 | -0.024 | 0.02 | -0.038 | 0.002 | -0.010 | 0.51 |
Data are expressed as β log exposures, unless otherwise stated. FEV1: forced expiratory volume in one second; FVC: forced vital capacity; PEF: peak expiratory flow; MMEF: maximal mid-expiratory flow; MEF75: maximal expiratory flow at 75% of vital capacity; MEF50: maximal expiratory flow at 50% of vital capacity; MEF25: maximal expiratory flow at 25% of vital capacity. *: significantly different, p<0.05.