Comparison of lung function and exhaled carbon monoxide(CO) measurement in firefighters compared with the SAPALDIA Basel sample
| Firefighters | SAPALDIA | p-value | |
| Subjects n | 101 | 735 | |
| Age at examination yrs | 41 (23–64) | 40 (18–62) | 0.853 |
| Height cm | 178±6 | 176±7 | 0.026 |
| Weight kg | 83±12 | 77±11 | <0.001 |
| BMI kg·m−2 | 26.2±3.4 | 24.7±3.5 | <0.001 |
| FEV1 % pred | 103±12 | 100±19 | 0.053 |
| FVC % pred | 97±14 | 91±13 | <0.001 |
| FEV1/FVC ratio | 0.77±0.07 | 0.75±0.09 | 0.078 |
| Exhaled CO ppm | 4±7 | 15±16 | <0.001 |
| Subjects with CO >10 ppm % | 11 | 37 | <0.001 |
Data are presented as mean (range) or mean±sd, unless otherwise stated. SAPALDIA: Swiss Study on Air Pollution and Lung Diseases in Adults; BMI: body mass index; FEV1: forced expiratory volume in one second; % pred: % predicted; FVC: forced vital capacity.