Table 2 Participant and non-participant characteristics
From: Fetal exposure to phthalates and bisphenols and DNA methylation at birth: the Generation R Study
| Â | Participants (three trimesters) | Non-participants |
|---|---|---|
n = 306 | n = 1 073 | |
Maternal characteristics | ||
 Age at enrollment, mean (SD) (years) | 32.1 (3.9)* | 30.1 (5.0)* |
Ethnicity, n (%) | ||
 European ancestry | 298 (97.4%)* | 455 (42.9%)* |
 Non-European ancestry | 8 (2.6%)* | 605 (57.1%)* |
Education, n (%) | ||
 Low-middle | 92 (30.2%)* | 564 (55.6%)* |
 High | 213 (69.8%)* | 450 (44.4%)* |
 Pre-pregnancy BMI, median (95% range) (kg/m2) | 22.6 (18.7–34.4) | 22.7 (18.4–35.1) |
 Folic acid supplementation, n (%), yes | 233 (93.6%)* | 654 (76.9%)* |
 Smoking sustained during pregnancy, n (%), yes | 24 (8.9%)* | 155 (15.9%)* |
 Alcohol consumption sustained during pregnancy (any), n (%), yes | 202 (55.8%)* | 340 (35.1%)* |
Child characteristics | ||
 Gender (boys), n (%) | 160 (52.3%) | 536 (50.0%) |
 Birth weight, mean (SD) (g) | 3556 (468)* | 3425 (503)* |
 Gestational age at birth, mean (SD) (weeks) | 40.3 (1.3)* | 40.0 (1.5)* |