Table 2.
The Social Gradient in HAP Exposure Hazard in U.S. (2005): Risk Ratios of 97th, 95th, and 80th Percentile to the Lowest Decile of Tract Population Size, Density, Economic Activity and SED.
| HAP Health Hazard Metrics | Ratio of HAP Exposure Risk at Selected Percentiles to Risk at 20th Percentile | County Population Size (2000) | Tract Population Density (2000) | Tract Townsend Index | County Employment (2005) | County Payroll per Employee (2005) |
|---|---|---|---|---|---|---|
| Respiratory Health Exposure Hazard | Ratio 80/20 | 2.73 | 2.85 | 1.73 | 3.93 | 2.65 |
| Ratio 95/20 | 2.81 | 4.51 | 2.94 | 4.39 | 3.23 | |
| Ratio 97/20 | 5.63 | 6.3 | 3.56 | 5.52 | 3.64 | |
| Neurological Health Exposure Hazard | Ratio 80/20 | 1.45 | 2.11 | 1.57 | 2.13 | 1.78 |
| Ratio 95/20 | 2.18 | 3.29 | 2.59 | 3.25 | 1.84 | |
| Ratio 97/20 | 1.91 | 4.21 | 2.82 | 2.26 | 1.76 | |
| Cancer Risk Factor | Ratio 80/20 | 1.82 | 1.85 | 1.38 | 2.17 | 1.83 |
| Ratio 95/20 | 1.99 | 2.63 | 2.01 | 2.48 | 2.11 | |
| Ratio 97/20 | 3.48 | 3.08 | 2.32 | 3.49 | 2.11 |