Table 4.
Percent Change in Hospital Admission Rates for ARDS According to 1 µg/m3 Increase in Annual Average PM2.5 Concentrations or 1 ppb Increase in Annual Average Ozone Concentrations (95% CI) in Regions of Low Air Pollution
| All Regions (N = 483,171) | Two-Pollutant Model |
|---|---|
| Low PM2.5 regions (n = 310,590) | |
| PM2.5 | 1.31 (1.11-1.51) |
| Ozone | 0.30 (0.21-0.40) |
| Low ozone regions (n = 446,429) | |
| PM2.5 | 0.78 (0.67-0.88) |
| Ozone | 0.16 (0.08-0.23) |
| Low PM2.5 and ozone regions (n = 283,237) | |
| PM2.5 | 1.50 (1.27-1.72) |
| Ozone | 0.27 (0.16-0.38) |
Low PM2.5 regions include ZIP codes with annual average PM2.5 < 12 µg/m3; low ozone regions include ZIP codes with annual average ozone < 45 ppb. See Table 2 legend for expansion of abbreviations.