Table 1.
Distribution of maternal characteristics between cases (n = 493) and controls (n = 472).
| Characteristic | Cases | Controls |
|---|---|---|
| Race [no. (%)] | ||
| White | 330 (66.9) | 333 (70.5) |
| Black | 117 (23.7) | 110 (23.3) |
| Asian | 24 (4.8) | 13 (2.7) |
| Hispanic/Amerindian | 22 (4.4) | 16 (3.4) |
| Age ≥ 36 years [no. (%)] | 86 (17.4) | 70 (14.8) |
| Schooling ≤ 12 years [no. (%)] | 108 (21.9) | 96 (20.3) |
| Prepregnancy BMI (mean ± SD) | 22.8 ± 4.3 | 23.2 ± 5.2 |
| Weight gain during pregnancy, kg (mean ± SD) | 12.7 ± 5.5 | 14.4 ± 5.6 |
| Primiparous [no. (%)] | 321 (65.2) | 234 (49.6) |
| Preeclampsia [no. (%)] | 69 (14.0) | 12 (2.5) |
| Previous IUGR among parous [no. (%)] | 66 (38.4) | 23 (9.7) |
| Any cigarette smoking in 3rd trimester [no. (%)] | 112 (22.7) | 72 (15.7) |