Table 2 Residential NRAP exposures from freeway and non-freeway sources for in utero, first year of life, and childhood periods in children in the CHS
Exposure Period | Mean ± SD | Median | IQR | Range |
|---|---|---|---|---|
Freeway NOx (ppb) | ||||
In utero | 16.7 ± 20.1 | 10.8 | 4.4–22.1 | 0–233.3 |
First year of life | 16.2 ± 19.5 | 10.4 | 4.1–21.9 | 0–304.2 |
Childhood | 15.1 ± 18.9 | 9.6 | 4.6–18.1 | 0–351.0 |
Non-Freeway NOx (ppb) | ||||
In utero | 10.3 ± 7.4 | 8.7 | 5.2–13.7 | 0.0003–74.0 |
First year of life | 9.3 ± 6.7 | 7.9 | 4.6–12.2 | 0.0003–77.4 |
Childhood | 6.2 ± 4.7 | 5.2 | 3.2–7.6 | 0.09–65.7 |