Table 4.
Neighborhood and housing characteristics associated with dust metal concentrations in multivariate regression models.a
| Characteristic | Pb (N = 53) β (SE) |
Zn (N = 53) β (SE) |
Cd (N = 49) β (SE) |
As (N = 50)b β (SE) |
Mn (N = 55) β (SE) |
|---|---|---|---|---|---|
| Soil concentration (μg/g)a | 0.04 (0.12) | −0.004 (0.09) | 0.07 (0.09) | 0.26 (0.17) | 0.36 (0.16)** |
| Chat sources | |||||
| No sourcec | 0 | 0 | 0 | 0 | – |
| One source | 0.39 (0.25) | 0.20 (0.18) | 0.06 (0.24) | 0.28 (0.18) | |
| Two sources | 0.71 (0.33)** | 0.74 (0.25)** | 0.99 (0.31)** | 0.65 (0.24)** | |
| Agricultural fields | |||||
| >0.5 kmc | – | – | – | 0 | 0 |
| ≤0.5 km | 0.30 (0.19) | 0.33 (0.18)* | |||
| Housing type | |||||
| Single-family homec | 0 | 0 | – | – | 0 |
| Other | −0.56 (0.30)* | −0.31 (0.22) | −0.58 (0.19)** | ||
| Distance to street (meters) | −0.02 (0.006)** | −0.007 (0.004)* | −0.01(0.005)* | – | – |
| Exterior lead paint | |||||
| Noc | 0 | 0 | 0 | – | – |
| Yes | 0.33 (0.29) | 0.31 (0.19) | 0.42 (0.26) | ||
| Occupant density | – | – | – | – | 0.88 (0.33)** |
| Central air-conditioning | |||||
| Noc | 0 | – | 0 | – | – |
| Yes | −0.48 (0.28)* | −0.43 (0.27) | |||
| Model R2 | 0.44 | 0.32 | 0.46 | 0.20 | 0.37 |
a
Dust and soil metal concentrations log transformed.
b
One outlier with an absolute studentized residual >3 was removed.
c
Reference group.
**
P<0.05 and
*
P<0.10.