Effect of averaged regional pollutants on lung function level
| Regional pollutant | % difference† | 95% CI |
|---|---|---|
| FEV1 | ||
| O3 (10:00–18:00) | −3.10 | (−5.24 to −0.91)** |
| PM2.5 | −2.94 | (−4.65 to −1.20)*** |
| PM10 | −2.19 | (−3.98 to −0.37)* |
| NO2 | −1.19 | (−4.14 to 1.85) |
| FVC | ||
| O3 (10:00–18:00) | −0.31 | (−3.11 to 2.57) |
| PM2.5 | −2.25 | (−3.94 to −0.52)* |
| PM10 | −2.05 | (−3.54 to −0.54)** |
| NO2 | −0.79 | (−3.52 to 2.02) |
†See footnote to table 2 for adjustment variables (community adjustment not included). Each pollutant was scaled to the range of the 24 h average over the study period from 2002 until 2007 with the exception of O3, which was scaled to the 8 h average from 10:00 to 18:00 (22.7 ppb for O3 13.3 µg/m3 for PM2.5, 30.3 µg/m3 for PM10, 19.4 µg/m3 for NO2).
*p<0.05, **p<0.01, ***p<0.005.
FEV1, forced expiratory volume in 1 s; FVC, forced vital capacity, NO2, nitrogen dioxide; O3, ozone; PM10 and PM2.5, particulate matter with aerodynamic diameter <10 µm and 2.5 µm.