Table 1.
Percent increase in long-term average census tract exposure per an additional 10% increase in the population with that characteristic.
| Population | PM2.5 | Al | NH4+ | Ca | Cl | EC | Ni | NO3– | OCM | Si | Na+ | SO42– | Ti | V | Zn | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Age (years) | ||||||||||||||||
| < 20 | 2.69 | 16.0* | 6.47 | 19.0* | –0.82 | –1.37 | 7.50 | 17.7* | –0.84 | 12.3* | 0.28 | –1.46 | 7.27 | 5.00 | 19.5 | |
| 20–64 | –5.00* | –11.2 | –11.3* | –14.7* | 7.89 | 3.69 | 14.4 | –14.2* | 3.32 | –7.48 | 6.54 | –6.37 | –3.18 | 15.0 | –27.2* | |
| ≥ 65 | 3.07 | –11.9 | 6.24 | –11.8 | –11.3 | –3.41 | –38.1* | –10.2 | –3.81 | –10.9 | –11.1 | 13.1* | –8.64 | –33.9* | 7.47 | |
| Race/ethnicity | ||||||||||||||||
| White | –1.37* | –4.93* | –1.02 | –5.61* | –8.13* | –5.35* | –10.0* | –2.20 | –2.72* | –4.08* | –4.01* | –0.27 | –4.77* | –8.89* | –6.71* | |
| African American | 1.88* | –0.39 | 1.95* | 0.32 | –2.08 | 2.93* | 2.50 | –2.92 | 1.89* | –0.64 | 0.46 | 4.22* | 0.23 | 2.22 | 6.10 | |
| Asian | –2.92 | –5.76 | –8.40 | 4.97 | 53.5* | 20.3* | 45.0* | 19.8* | 4.69 | –5.47 | 29.9* | –18.3* | 16.8* | 50.0* | –5.41 | |
| Hispanic | 0.13 | 18.2* | –0.18 | 16.7* | 25.4* | 7.17* | 21.3* | 12.9* | 3.04* | 15.9* | 8.47* | –7.39* | 13.2* | 16.7* | 4.73 | |
| Other | –16.4* | 8.33 | –36.5* | 31.0 | 84.2* | 23.3* | 72.5* | 18.4 | 16.8 | 10.8 | 23.3 | –59.4* | 16.8 | 52.2* | 63.4 | |
| Education | ||||||||||||||||
| < High school | 4.69* | 8.30* | 5.26* | 13.3* | 11.5 | 9.55* | 7.50 | 5.66 | 5.14* | 8.04* | 3.64 | 4.31* | 9.77* | 12.2* | 19.1* | |
| High school | 2.34 | –11.1* | 7.34* | –15.7* | –19.8* | –5.38 | –26.9* | –7.43 | –4.66 | –10.4* | –12.8* | 12.5* | –13.9* | –20.6* | 5.07 | |
| College | –3.55* | –2.36 | –5.21* | –4.26 | –2.08 | –4.62* | 2.50 | –1.63 | –2.03 | –2.36 | 1.03 | –5.96* | –2.50 | –2.22 | –13.4* | |
| Unemployed | 4.63 | 13.5 | 3.10 | 13.9 | 22.4 | 18.3* | 16.9 | 10.3 | 12.0* | 12.6 | 3.72 | –2.52 | 15.2* | 20.0* | 22.0 | |
| Poverty | 2.16* | 7.31* | –0.69 | 9.89* | 9.39 | 8.78* | 11.3 | –2.14 | 7.15* | 6.19* | 3.24 | 0.17 | 7.95* | 8.89* | 11.2 | |
| Earnings ($US/year) | ||||||||||||||||
| < $15,000 | 0.07 | 10.4* | –3.73 | 10.1* | 3.63 | 3.12 | –8.13 | –2.45 | 5.30* | 10.4* | 0.09 | –3.77 | 8.64* | –1.67 | 5.14 | |
| $15,000–$29,999 | 2.61 | –3.37 | 4.59 | –6.61 | –8.65 | 3.81 | 8.13 | –2.74 | 1.24 | –3.82 | –1.30 | 7.15* | –2.50 | –4.44 | 6.99 | |
| $30,000–$49,999 | –1.55 | –17.2* | 4.49 | –18.8* | –8.4 | –10.5* | –15.0 | 2.43 | –11.7* | –17.0* | –4.05 | 5.04 | –18.0* | –7.78 | –7.88 | |
| ≥ $50,000 | –1.21 | –10.8 | 2.38 | –6.79 | 3.25 | –3.75 | 20.6 | 6.19 | –6.07 | –10.8 | 3.15 | 0.21 | –7.05 | 11.1 | –12.2 | |
| This table provides the percent increase in exposure level, evaluated at the mean for a 10% increase in population characteristic of a census tract. White, African American, and Asian refer to non-Hispanics. *p < 0.05. | ||||||||||||||||