Distribution of 24 hour mean air pollution concentrations and meteorology conditions measured at the East St Louis Supersite from May 2001 to December 2002
| Parameter | No. days | Centiles | Daily IQR | Case/control IQR | ||
|---|---|---|---|---|---|---|
| 25th | 50th | 75th | ||||
| Total possible days = 602. | ||||||
| Interquartile range increase (IQR; 25th to 75th centile) in daily (24 hour) concentrations and in 24 hour moving average concentrations in matched case/control periods. | ||||||
| PM2.5 (μg/m3) | 593 | 12.1 | 16.2 | 21.8 | 9.7 | 7.1 |
| Elemental carbon (μg/m3) | 536 | 0.5 | 0.6 | 1.0 | 0.5 | 0.5 |
| Organic carbon (μg/m3) | 536 | 3.1 | 4.0 | 5.4 | 2.3 | 2.1 |
| Nitrogen dioxide (ppb) | 583 | 15 | 18 | 21 | 6 | 5 |
| Carbon monoxide (ppm) | 589 | 0.4 | 0.5 | 0.6 | 0.2 | 0.2 |
| Sulphur dioxide (ppb) | 599 | 2 | 4 | 7 | 5 | 5 |
| Ozone (ppb) | 591 | 13 | 21 | 31 | 18 | 8 |
| Temperature (°C) | 600 | 7 | 17 | 25 | 18 | 7 |
| Relative humidity (%) | 602 | 58 | 64 | 74 | 16 | 10 |
| Barometric pressure (mm Hg) | 602 | 749.1 | 751.6 | 754.3 | 5.2 | 5.6 |