Two pollutant analysis in children. The diagonal elements give the single pollutant model results (the most significant single day lag is used) and the off-diagonal elements the results for the “row pollutant” when adjusted for the “column pollutant”
| Pollutant | % change in risk for a 10–90th centile change (95% CI) | ||||
|---|---|---|---|---|---|
| NO2 | Ozone | SO2 | PM10 | ||
| Asthma | |||||
| NO2 maximum | 5.2 (0.8 to 9.8) | 6.7 (2.2 to 11.4) | 3.9 (−1.2 to 9.2) | 5.3 (−0.6 to 11.6) | |
| p = 0.02 | p = 0.003 | p = 0.1 | p = 0.08 | ||
| Ozone 8 h maximum | −9.0 (−14.3 to −3.4) | −8.6 (−14.0 to −3.0) | −8.5 (−13.8 to −2.9) | −8.7 (−14.4 to −2.7) | |
| p = 0.002 | p = 0.003 | p = 0.004 | p = 0.005 | ||
| SO2 average | 2.7 (−2.7 to 8.4) | 5.9 (1.1 to 10.9) | 4.9 (0.1 to 9.8) | 3.4 (−3.0 to 10.2) | |
| p = 0.3 | p = 0.02 | p = 0.04 | p = 0.3 | ||
| PM10 average | 0.5 (−5.4 to 6.6) | 3.4 (−1.3 to 8.4) | 1.9 (−3.9 to 8.0) | 3.8 (−1.0 to 8.8) | |
| p = 0.9 | p = 0.2 | p = 0.5 | p = 0.1 | ||
| LRD (excluding asthma) | |||||
| NO2 maximum | 4.2 (1.1 to 7.3) | 4.9 (1.8 to 8.2) | 2.5 (−1.1 to 6.2) | 3.5 (0.1 to 6.9) | |
| p = 0.007 | p = 0.002 | p = 0.2 | p = 0.04 | ||
| Ozone 8 h maximum | −6.6 (−10.5 to −2.6) | −6.1 (−10.0 to −2.1) | −6.4 (−10.3 to −2.4) | −6.4 (−10.5 to −2.2) | |
| p = 0.001 | p = 0.003 | p = 0.002 | p = 0.004 | ||
| SO2 average | 3.1 (−0.6 to 6.9) | 4.8 (1.6 to 8.1) | 4.5 (1.4 to 7.8) | 3.8 (0.4 to 7.2) | |
| p = 0.1 | p = 0.003 | p = 0.004 | p = 0.03 | ||
| PM10average | 1.7 (−1.6 to 5.0) | 2.3 (−1.0 to 5.6) | 1.6 (−1.7 to 5.0) | 2.5 (−0.7 to 5.8) | |
| p = 0.3 | p = 0.2 | p = 0.3 | p = 0.1 | ||
Results for daily maximum hour NO2 levels are displayed rather than daily averages.