Table 1.
Mean (minimum–maximum) number of days of observation in the study period used for community-specific mortality risk models, IQR (median of monitor-specific IQRs), and median (minimum–maximum) community-specific average constituent concentration (μg/m3).
| Pollutant | No. of days | IQR | Concentration |
|---|---|---|---|
| PM2.5 | 1,636 (456–2,189) | 8.00 | 13.6 (6.38–22.84) |
| OCM | 388 (58–907) | 3.08 | 4.15 (2.22–8.89) |
| EC | 395 (58–921) | 0.37 | 0.68 (0.29–1.51) |
| Silicon | 395 (56–920) | 0.08 | 0.11 (0.05–0.52) |
| Sodium ion | 374 (58–834) | 0.11 | 0.12 (0.04–0.60) |
| Nitrate | 387 (58–720) | 1.22 | 1.70 (0.50–10.05) |
| Ammonium | 392 (58–923) | 1.14 | 1.53 (0.34–3.90) |
| Sulfate | 392 (58–923) | 2.75 | 3.50 (0.71–5.91) |