Lung function change in those exposed to dense traffic (>10 000 vehicles per day) versus reference (>500 m)
| Outcome | n | Unadjusted models | p for trend | Adjusted* models | p for trend |
|---|---|---|---|---|---|
| Traffic exposure | % (95% CI) | % (95% CI) | |||
| FEV1 | |||||
| >500 m | 2441 | – | – | ||
| 75–500 m | 2688 | −0.66 (−1.41 to 0.09) | −0.80 (−1.53 to −0.07) | ||
| <75 m | 367 | −0.93 (−2.44 to 0.57) | 0.065 | −1.01 (−2.47 to 0.45) | 0.027 |
| FVC | |||||
| >500 m | 2441 | – | – | ||
| 75–500 m | 2688 | −0.37 (−1.05 to 0.32) | −0.57 (−1.23 to 0.10) | ||
| <75 m | 367 | −0.80 (−2.16 to 0.58) | 0.167 | −0.91 (−2.24 to 0.42) | 0.058 |
*Adjusted for age, gender, body mass index, education and smoking status.
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity.