Table 6 Change in lung function during a workshift before and after implementation of smoking ban among non‐smokers (n = 26), individuals with asthma in the history (n = 11), and smokers (n = 43).
| Before ban, mean (SD) | Change (%) | After ban, mean (SD) | Change (%) | p Value | |
|---|---|---|---|---|---|
| Non‐smokers | |||||
| FVC (ml) | −97 (168) | −2.2 | −56 (115) | −1.4 | 0.24 |
| FEV1 (ml) | −120 (155) | −3.1 | −37 (127) | −1.1 | 0.03 |
| FEF25–75%(ml/s) | −218 (286) | −5.4 | −65 (274) | −1.3 | 0.01 |
| PEF (l/min) | 22 (67) | 0.4 | 2 (74) | 1.9 | 0.22 |
| Asthmatics | |||||
| FVC (ml) | −89 (121) | −2.3 | 6 (63) | 0.02 | 0.04 |
| FEV1 (ml) | −122 (130) | −3.6 | 12 (90) | 0.2 | 0.02 |
| FEF25–75%(ml/s) | −316 (469) | −9.2 | 21 (274) | 0.8 | 0.01 |
| PEF (l/min) | 28 (65) | 4.6 | 2 (65) | 1.4 | 0.49 |
| Smokers | |||||
| FVC (ml) | −71 (113) | −1.6 | −49 (177) | −0.9 | 0.51 |
| FEV1 (ml) | −71 (114) | −2.1 | −52 (167) | −1.4 | 0.57 |
| FEF25–75%(ml/s) | −187 (420) | −5.0 | −64 (329) | −2.1 | 0.12 |
| PEF (l/min) | 26 (89) | 5.8 | 13 (56) | 2.6 | 0.02 |
*Cross shift changes significantly changed from before application of ban p<0.05 (Student's paired t test).