Table 1 Descriptive statistics of demographic variables and prenatal exposures to PM2.5 and NO2 for mother–child pairs with all exposures and main covariates (N = 520)
Variables | N (%); Mean (SD) |
|---|---|
Child sex | |
Female | 284 (55%) |
Male | 236 (45%) |
Maternal ethnicity | |
African American | 197 (38%) |
Dominican | 323 (62%) |
ETS (Smoker in the home) | 175 (34%) |
Maternal education | |
High school and higher | 310 (60%) |
Lower than high school | 210 (40%) |
Maternal intelligence (TONI) | 20.50 (8.72) |
Maternal demoralization | 1.13 (0.63) |
PM2.5 at first trimester (μg/m3) | 17.47 (3.43) |
PM2.5 at second trimester (μg/m3) | 16.84 (3.49) |
PM2.5 at third trimester (μg/m3) | 16.85 (2.81) |
PM2.5 over entire pregnancy (μg/m3) | 17.10 (2.16) |
NO2 at first trimester (ppb) | 32.13 (6.83) |
NO2 at second trimester (ppb) | 31.50 (6.21) |
NO2 at third trimester (ppb) | 31.10 (5.83) |
NO2 over entire pregnancy (ppb) | 31.58 (5.81) |