Table 2.
Two-pollutant models of excess risk (%) and 95% confidence intervals for mortality.
| Two-pollutant models | Estimates, % (95% CI) | |
|---|---|---|
| PM2.5 | − | 0.84 (0.47, 1.21)* |
| + SO2 | 0.65 (0.13, 1.17)* | |
| + O3 | 0.79 (0.37, 1.21)* | |
| + CO | 0.85 (0.37, 1.33)* | |
| PM10 | − | 0.70 (0.44, 0.96)* |
| + SO2 | 0.71 (0.32, 1.09)* | |
| + O3 | 0.71 (0.41, 1.00)* | |
| + CO | 0.77 (0.44, 1.11)* | |
| SO2 | − | 3.59 (1.77, 5.43)* |
| + PM2.5 | 1.31 (−1.19, 3.87) | |
| + PM10 | −0.07 (−2.66, 2.59) | |
| + O3 | 3.11 (1.14, 5.11)* | |
| + NO2 | −0.41 (−2.86, 2.11) | |
| + CO | 3.00 (0.97, 5.07)* | |
| O3 | − | 0.21 (0.05, 0.36)* |
| + PM2.5 | 0.05 (−0.13, 0.22) | |
| + PM10 | 0 (−0.18, 0.17) | |
| + SO2 | 0.10 (−0.07, 0.27) | |
| + NO2 | 0 (−0.17, 0.18) | |
| + CO | 0.16 (0, 0.32)* | |
| NO2 | − | 1.06 (0.70, 1.41)* |
| + SO2 | 1.12 (0.61, 1.62)* | |
| + O3 | 1.05 (0.66, 1.45)* | |
| + CO | 1.12 (0.69, 1.56)* | |
| CO | − | 0.05 (0.02, 0.09)* |
| + PM2.5 | 0 (−0.05, 0.05) | |
| + PM10 | −0.02 (−0.06, 0.03) | |
| + SO2 | 0.03 (−0.02, 0.07) | |
| + O3 | 0.04 (0.01, 0.08)* | |
| + NO2 | −0.01 (−0.06, 0.03) |
*P< 0.05. CI, confidence interval; PM2.5, fine particulate matter; PM10, inhalable particles; SO2, sulfur dioxide; O3, ozone; NO2, nitric dioxide; CO, carbon monoxide.