Table 1.
Descriptive characteristics for pooled sample and individual cohorts
| Pooled Sample | ACCESS | PRISM | PROGRESS | ||
|---|---|---|---|---|---|
| N | 1966 | 660 | 365 | 941 | |
| 3rd trimester PM2.5 (μg/m3)* | 16.27 (15.93, 16.61) | 10.75 (10.62,10.88) | 8.23 (8.09, 8.38) | 23.13 (22.8, 23.46) | |
| Birth weight for gestational age z-score* | −0.24(−0.29, −0.19) | −0.09 (−0.19,0.00) | −0.11 (−0.21, −0.02) | −0.46 (−0.52, −0.39) | |
| Maternal pre-pregnancy BMI* | 26.6 (26.34, 26.86) | 28.8 (28.3, 29.3) | 25.93 (25.3, 26.55) | 25.23 (24.94, 25.52) | |
| Maternal age at enrollment* | 28.37 (28.12, 28.64) | 27.1 (26.64, 27.56) | 31.5 (30.94, 32.06) | 28.04 (27.69, 28.39) | |
| Sex* | Male | 52% | 52% | 51% | 52% |
| Female | 48% | 48% | 49% | 48% | |
| Race/Ethnicity* | White, Non-Hispanic | 10% | 10% | 36% | 0% |
| Non-White and/or Hispanic | 90% | 90% | 64% | 100%* | |
| Education* | ≥ High School | 62% | 61% | 27% | 76% |
| > High School | 38% | 39% | 73% | 24%* | |
Means (95% CI) shown
*
P < 0.05, differences tested using ANOVA for continuous variables and Chi-Square for dichotomous variables