Table 1.
Regression model coefficients (β) and their 95% confidence intervals on a 1 µg m−3 and IQR-normalized basis for total PM2.5 (SP model), OA (MP model), and SOA (MP OA model) for the contiguous U.S. and southeastern U.S. Concentration is population weighted at the county level.
| β [95% CI] for 1 µg m−3 change in pollutant | β [95% CI] for IQR change in pollutant | Average concentration | IQR | |
|---|---|---|---|---|
| (deaths 10−5 µg−1 m3) | (deaths 10−5) | (µg m−3) | (µg m−3) | |
| Contiguous U.S. | ||||
| PM2.5 | 1.4 [0.5, 2.3] | 3.7 [1.2, 6.2] | 7.4 | 2.7 |
| OA | 8.1 [5.4, 11] | 13 [8.8, 18] | 3.2 | 1.6 |
| SOA | 8.9 [6.0, 12] | 13 [8.6, 17] | 2.3 | 1.4 |
| Southeastern U.S. | ||||
| PM2.5 | 9.1 [4.3, 14] | 10 [5.0, 16] | 7.9 | 1.1 |
| OA | 23 [13, 33] | 22 [13, 32] | 3.8 | 1.0 |
| SOA | 27 [16, 38] | 22 [13, 31] | 3.0 | 0.8 |