Two pollutant models for those pollutants with significant associations in the single pollutant models. Effect of row pollutant when the column pollutant is entered into the model. Percentage change in admissions for 10 unit change in pollutant level (95% confidence limits)
| Age (years) | Season | Pollutant (lag) | Single pollutant model | 8 h O3 | 24 h NO2 | 24 h SO2 | 24 h BS |
|---|---|---|---|---|---|---|---|
| 0–14 | All year | NO2 (2) | 1.25 (0.3,2.2)3-150 | 1.13 (−0.10,2.36) | — | 0.97 (−0.05,1.99) | 2.26 (0.83,3.71)*** |
| SO2 (1) | 1.64 (0.29,3.01)3-150 | 1.77 (0.22,3.36)3-150 | 1.23 (−0.22,2.69) | — | 1.66 (0.23,3.12)3-150 | ||
| Warm | SO2 (1) | 3.33 (1.09,5.63)** | 3.35 (0.89,5.87)** | 2.92 (0.58,5.32)3-150 | — | 3.66 (1.35,6.02)** | |
| Cool | O3 (0) | −2.95 (−5.80,−0.02)3-150 | — | −2.91 (−5.77,0.03) | −2.92 (−5.80,0.04) | −2.95 (−5.81,−0.01)3-150 | |
| NO2 (2) | 1.18 (0.02,2.35)3-150 | 0.91 (−0.66,2.51) | — | 1.06 (−0.17,2.29) | 1.84 (−0.03,3.75) | ||
| 15–64 | All year | O3 (1) | 3.93 (1.77,6.15)*** | — | 4.00 (1.83,6.22)*** | 4.04 (1.86,6.27)*** | 3.96 (1.78,6.18)*** |
| Warm | O3(1) | 4.25 (1.83,6.74)*** | — | 4.31 (1.87,6.82)*** | 4.82 (2.28,7.42)*** | 4.15 (1.73,6.63)*** | |
| 65+ | All year | NO2 (2) | 2.96 (0.67,5.31)** | 4.51 (1.43,7.69)** | — | 2.49 (−0.25,5.31) | 1.88 (−1.49,5.36) |
| BS (2) | 5.60 (1.09,10.31)3-150 | 7.56 (1.19,14.34)3-150 | 2.92 (−3.56,9.85) | 4.56 (−0.88,10.29) | — | ||
| Cool | NO2 (2) | 3.52 (0.81,6.30)3-150 | 5.14 (0.69,9.79)3-150 | — | 2.10 (−1.08,5.39) | 4.47 (−0.04,9.19) | |
| SO2 (2) | 5.85 (1.81,10.05)** | 7.84 (2.48,13.48)** | 4.19 (−0.53,9.13) | — | 5.29 (0.42,10.40)3-150 | ||
| All ages | All year | NO2 (2) | 1.25 (0.49,2.02)*** | 1.08 (0.12,2.05)3-150 | — | 0.99 (0.18,1.81)3-150 | 1.23 (0.47,2.00)** |
| SO2 (1) | 1.64 (0.54,2.75)3-150 | 1.48 (0.24,2.73)3-150 | 1.14 (−0.04,2.33) | — | 1.54 (0.36,2.73)3-150 | ||
| Warm | O3 (1) | 2.21 (0.62,3.82)** | — | 1.97 (0.35,3.62)3-150 | 1.99 (0.40,3.61)3-150 | 2.18 (0.59,3.79)** | |
| SO2 (1) | 2.02 (0.22,3.85)3-150 | 1.91 (0.05,3.81)3-150 | 1.64 (−0.23,3.56) | — | 2.18 (0.32,4.07)3-150 | ||
| Cool | O3 (1) | −3.17 (−5.44,0.84)** | — | −2.90 (−5.26,−0.49)3-150 | −3.01 (−5.36,−0.60)3-150 | −2.92 (−5.24,−0.54)3-150 | |
| NO2 (2) | 1.30 (0.38,2.23)** | 0.50 (−0.79,1.81) | — | 1.10 (0.12,2.08)3-150 | 1.29 (0.37,2.22)** | ||
| SO2 (1) | 1.41 (1.00,2.83)3-150 | −0.09 (−1.61,1.82) | 0.83 (−0.67,2.34) | — | 1.11 (−0.41,2.66) |
BS = black smoke.
↵3-150 p<0.05; **p<0.01; ***p<0.001.