Table 3.
Maternal and neonatal characteristics.
| Pairs with data | Present only in cases | Present only in controls | Odds ratio (95% CI) | |
|---|---|---|---|---|
| Adolescent mother | 402 | 59 (14.7) | 74 (18.4) | 0.80 (0.56; 1.14) |
| <8 years of school | 381 | 95 (24.9) | 88 (23.1) | 1.08 (0.80; 1.46) |
| >6 prenatal visits | 390 | 94 (24.1) | 90 (23.1) | 1.04 (0.77; 1.41) |
| First delivery | 402 | 111 (27.6) | 94 (23.4) | 1.18 (0.89; 1.57) |
| Previous C-section | 390 | 84 (21.5) | 49 (12.6) | 1.71 (1.19; 2.49) |
| Previous fetal death | 401 | 17 (4.2) | 17 (4.2) | 1.00 (0.48; 2.09) |
| Diabetes | 402 | 26 (6.5) | 18 (4.5) | 1.44 (0.76; 2.80) |
| Hypertension | 402 | 82 (20.4) | 52 (12.9) | 1.58 (1.10; 2.28) |
| Placental abruption | 402 | 20 (5.0) | 2 (0.5) | 10.00 (2.43; 88.24) |
| Oligohydramnios | 401 | 14 (3.5) | 10 (2.5) | 1.40 (0.58; 3.52) |
| Birthweight <3000 g | 402 | 8 (2.0) | 4 (1.0) | 2.00 (0.53; 9.07) |
| Gestational age <37 wk | 402 | 17 (4.2) | 4 (1.0) | 4.25 (1.39; 17.36) |
CI: confidence interval, wk: weeks.