Incidences (95% CI)/ΔSD of pollutant relative to incidence at mean annual concentration of pollutant adjusted for season, temperature, wind speed, and infection (for ozone 0.5 SDs)
| Pollutant | ΔSD | Total cases | Cases <2 y | Cases >2 y | Total controls |
| Ozone | −1.5 | 1.22 (0.96 to 1.55) | 1.65 (1.22 to 2.22) | 0.97 (0.69 to 1.36) | 1.04 (0.97 to 1.12) |
| −0.5 | 1.03 (0.96 to 1.10) | 1.10 (1.03 to 1.19) | 0.98 (0.89 to 1.07) | 1.01 (0.99 to 1.03) | |
| 0 | 1.00 | 1.00 | 1.00 | 1.00 | |
| +0.5 | 1.03 (0.97 to 1.09) | 1.01 (0.94 to 1.10) | 1.04 (0.97 to 1.11) | 1.00 (0.99 to 1.01) | |
| +1.5 | 1.20 (0.98 to 1.46) | 1.27 (0.93 to 1.72) | 1.16 (0.92 to 1.45) | 1.02 (0.96 to 1.07) | |
| +2.5 | 1.42 (0.99 to 2.03) | 1.63 (0.94 to 2.84) | 1.30 (0.87 to 1.94) | 1.03 (0.93 to 1.14) | |
| SO2 | +1 | 1.07 (1.00 to 1.15) | 1.05 (0.97 to 1.12) | 1.09 (1.00 to 1.19) | 1.02 (1.00 to 1.03) |
| NO2 | +1 | 1.05 (1.00 to 1.10) | 1.07 (0.98 to 1.17) | 1.04 (0.98 to 1.11) | 1.02 (1.00 to 1.03) |
| PM10 | +1 | 1.06 (0.99 to 1.14) | 1.00 (0.92 to 1.09) | 1.10 (1.00 to 1.21) | 1.01 (1.00 to 1.03) |
| Benzene | +1 | 1.06 (1.03 to 1.09) | 1.08 (1.02 to 1.13) | 1.05 (0.99 to 1.10) | 1.01 (0.99 to 1.02) |
| 1,3-Butadiene | +1 | 1.06 (1.02 to 1.10) | 1.06 (1.00 to 1.14) | 1.05 (0.98 to 1.13) | 0.99 (0.98 to 1.00) |
| cis-2-Butene | +1 | 1.03 (1.00 to 1.07) | 1.05 (1.00 to 1.11) | 1.02 (0.97 to 1.06) | 1.00 (0.98 to 1.01) |
| n-Butane | +1 | 1.04 (1.01 to 1.08) | 1.06 (1.00 to 1.12) | 1.03 (0.98 to 1.08) | 1.00 (0.98 to 1.02) |
| tr-2-Butene | +1 | 1.04 (1.00 to 1.07) | 1.05 (1.00 to 1.11) | 1.02 (0.98 to 1.07) | 1.00 (0.98 to 1.02) |
| Ethene | +1 | 1.07 (1.03 to 1.11) | 1.08 (1.01 to 1.15) | 1.06 (0.99 to 1.12) | 1.01 (0.99 to 1.03) |
| Ethylbenzene | +1 | 1.05 (1.02 to 1.09) | 1.08 (1.03 to 1.14) | 1.03 (0.98 to 1.09) | 1.00 (0.99 to 1.02) |
| Ethyne | +1 | 1.04 (1.00 to 1.08) | 1.07 (1.02 to 1.12) | 1.02 (0.97 to 1.07) | 1.01 (0.99 to 1.02) |
| n-Heptane | +1 | 1.05 (1.02 to 1.09) | 1.07 (1.02 to 1.13) | 1.04 (0.99 to 1.09) | 1.00 (0.99 to 1.02) |
| n-Hexane | +1 | 1.06 (1.02 to 1.10) | 1.07 (1.00 to 1.14) | 1.05 (0.99 to 1.10) | 1.01 (0.99 to 1.03) |
| m+p-Xylene | +1 | 1.05 (1.02 to 1.09) | 1.08 (1.03 to 1.14) | 1.03 (0.98 to 1.09) | 1.01 (0.98 to 1.03) |
| o-Xylene | +1 | 1.06 (1.02 to 1.09) | 1.08 (1.03 to 1.14) | 1.03 (0.98 to 1.09) | 1.00 (0.99 to 1.02) |
| cis-2-Pentene | +1 | 1.04 (1.01 to 1.08) | 1.07 (1.02 to 1.13) | 1.02 (0.97 to 1.07) | 0.99 (0.98 to 1.01) |
| iso-Pentane | +1 | 1.04 (1.01 to 1.08) | 1.06 (1.00 to 1.12) | 1.03 (0.98 to 1.08) | 1.00 (0.99 to 1.02) |
| trans-2-Pentene | +1 | 1.04 (1.01 to 1.07) | 1.07 (1.01 to 1.12) | 1.02 (0.97 to 1.07) | 1.00 (0.98 to 1.01) |
| me-Pentane | +1 | 1.05 (1.02 to 1.09) | 1.08 (1.02 to 1.14) | 1.04 (0.99 to 1.09) | 1.00 (0.99 to 1.02) |
| n-Pentane | +1 | 1.05 (1.01 to 1.08) | 1.06 (1.01 to 1.12) | 1.03 (0.98 to 1.09) | 1.00 (0.98 to 1.02) |
| Toluene | +1 | 1.05 (1.02 to 1.09) | 1.07 (1.01 to 1.13) | 1.04 (0.98 to 1.10) | 1.00 (0.99 to 1.02) |
| Ethane | +1 | 1.05 (1.00 to 1.10) | 1.05 (0.97 to 1.14) | 1.05 (0.98 to 1.12) | 1.00 (0.99 to 1.02) |
| Propane | +1 | 1.05 (1.00 to 1.11) | 1.07 (0.99 to 1.15) | 1.04 (0.97 to 1.12) | 1.01 (0.99 to 1.03) |
| Isoprene | +1 | 1.03 (0.98 to 1.08) | 1.07 (1.01 to 1.15) | 1.00 (0.93 to 1.07) | 1.02 (1.00 to 1.04) |
| Average HC | +1 | 1.06 (1.03 to 1.10) | 1.08 (1.02 to 1.14) | 1.05 (0.99 to 1.11) | 1.00 (0.98 to 1.02) |
Values for ozone with lag=0 days. Values for all other pollutants with lag=2 days.
Abbreviations as for table 2.