Association of long-term seasonal mean concentration of air pollutants with growth in lung function: two pollutant models
| Model# | FVC dpd¶ | FEV1 dpd+ | MEF25–75 dpd§ | |||
| β | p-value | β | p-value | β | p-value | |
| PM10+O3 | ||||||
| Summer | 0.001 | 0.911 | −0.022 | 0.008 | −0.087 | 0.000 |
| Winter | 0.010 | 0.019 | 0.004 | 0.338 | −0.008 | 0.434 |
| PM10+NO2 | ||||||
| Summer | −0.018 | 0.056 | −0.038 | 0.000 | −0.102 | 0.000 |
| Winter | 0.015 | 0.000 | 0.011 | 0.0054 | 0.005 | 0.610 |
| PM10+SO2 | ||||||
| Summer | 0.005 | 0.575 | −0.022 | 0.010 | −0.095 | 0.000 |
| Winter | 0.004 | 0.492 | −0.005 | 0.358 | −0.011 | 0.474 |
| PM10+temperature | ||||||
| Summer | −0.007 | 0.417 | −0.034 | 0.000 | −0.112 | 0.000 |
| Winter PM10 | −0.003 | 0.599 | −0.011 | 0.016 | −0.013 | 0.295 |
| O3+PM10 | ||||||
| Summer | −0.015 | 0.000 | −0.020 | 0.000 | −0.009 | 0.406 |
| Winter | −0.010 | 0.089 | −0.012 | 0.036 | −0.009 | 0.548 |
| NO2+PM10 | ||||||
| Summer | 0.005 | 0.515 | 0.000 | 0.973 | −0.013 | 0.447 |
| Winter | −0.034 | 0.000 | −0.037 | 0.000 | −0.036 | 0.021 |
| SO2+PM10 | ||||||
| Summer | 0.008 | 0.395 | 0.010 | 0.271 | 0.037 | 0.086 |
| Winter | 0.004 | 0.225 | 0.007 | 0.025 | 0.007 | 0.429 |
FVC: forced vital capacity
FEV1: forced expiratory volume in one second
MEF25–75: midexpiratory flow between 25 and 75% of the forced vital capacity
PM10: particulate matter <10 µm in diameter
O3: ozone
NO2: nitrogen dioxide
SO2: sulphur dioxide
The model was for sex, atopy, passive smoking, height 1994, height difference, site, lung function 1994
¶: change in FVC mL·day−1
+: change in FEV1 mL·day−1
§: change in MEF25–75 mL·s−1·day−1
#: β is calculated for the slope of the first air pollutant shown, adjusted for the pollutant in brackets