Type | Variable | Category | Mean | Median | Inter quartile range (IQR)a |
---|---|---|---|---|---|
Target variable | Term birth weight (g) | Â | 3393 | 3392 | 58 (3363,3421) |
Pollution indicator | Spatiotemporal NO2 (ppb)b | Â | 25.00 | 24.14 | 11.43 (18.74, 30.17) |
Spatiotemporal NOx (ppb)c | Â | 17.32 | 26.31 | 31.32 (15.48, 46.80) | |
Individual- level variable | NDVI | Â | 0.26 | 0.25 | 0.09 (0.21, 0.30) |
Maternal age | Â | 28.8 | 28.1 | 4.1 (26.7, 30.8) | |
Length of gestation | Â | 277 | 276 | 12 (271,283) | |
Infant gender (percentage) | Male | 49 % | 49 % | 6 % (46–52 %) | |
Female | 51 % | 51 % | 6 % (48–54 %) | ||
Race/ethnicity (percentage) | Hispanic | 54 % | 57 % | 57 % (26–83 %) | |
White | 24 % | 12 % | 43 % (2–45 %) | ||
Black | 6 % | 3 % | 5 % (0.8–6 %) | ||
Asian | 13 % | 8 % | 14 % (2–16 %) | ||
Others | 2 % | 1 % | 2 % (1–3 %) | ||
Maternal educational level (percentage) | Less than 8th grade | 10 % | 8 % | 15 % (1–16 %) | |
9th grade to high school | 42 % | 47 % | 36 % (24–60 %) | ||
Less than 4 years of college | 29 % | 20 % | 43 % (6–49 %) | ||
4+ of college | 19 % | 19 % | 11 % (13–24 %) |