Table 2 Distribution of pollutant exposures averaged over length of pregnancy, as measured within 10 km of mother's residential geocode.
From: Ambient air pollution exposure and full-term birth weight in California
pollutant | unit | N | mean | SD | interquartile range |
|---|---|---|---|---|---|
CO | ppm | 2,853,245 | 0.87 | 0.45 | 0.56 - 1.09 |
NO2 | pphm | 2,808,662 | 2.42 | 0.95 | 1.69 - 3.12 |
O3 | pphm | 3,303,834 | 2.35 | 0.65 | 1.89 - 2.74 |
SO2 | ppb | 1,167,449 | 2.10 | 1.08 | 1.25 - 2.84 |
PM10 | μ g/m3 | 1,778,579 | 31.4 | 11.2 | 22.6 - 38.7 |
PM2.5 | μ g/m3 | 1,402,622 | 16.7 | 5.5 | 12.0 - 21.0 |
PMcoarse | μ g/m3 | 740,885 | 15.7 | 7.5 | 11.0 - 18.1 |