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.
From: Secondary organic aerosol association with cardiorespiratory disease mortality in the United States
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 |
