Joint analysis of regional air pollution and near-roadway total nitrogen oxides (NOx) on lung function
| Effect of regional pollutant† | Effect of near-roadway NOx† | |||
|---|---|---|---|---|
| Regional pollutant | % Difference | 95% CI | % Difference | 95% CI |
| FEV1 | ||||
| O3 (10:00–18:00) | −3.24 | (−5.32 to −1.11)*** | −1.04 | (−2.11 to 0.05) |
| PM2.5 | −3.00 | (−4.76 to −1.21)*** | −1.07 | (−2.14 to 0.01) |
| PM10 | −2.24 | (−4.04 to −0.41)* | −1.14 | (−2.22 to −0.06)* |
| NO2 | −1.22 | (−4.23 to 1.88) | −1.07 | (−2.15 to 0.02) |
| FVC | ||||
| O3 (10:00–18:00) | −0.34 | (−3.21 to 2.63) | −1.47 | (−2.53 to −0.41)** |
| PM2.5 | −2.35 | (−4.09 to −0.57)** | −1.40 | (−2.46 to −0.34)** |
| PM10 | −2.17 | (−3.68 to −0.63)** | −1.49 | (−2.54 to −0.43)** |
| NO2 | −0.78 | (−3.62 to 2.15) | −1.46 | (−2.52 to −0.39)** |
†See table 2 for adjustment variables (community adjustment not included) and scaling factor for pollutant effects of near-roadway NOx. See footnote to table 4 for scaling factor for regional pollutants.
*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.