Table 1.
Baseline characteristics of pregnant women in the first trimester
| General characteristics | Mean ± SDa or % (n = 479) |
|---|---|
| Maternal age (years)a | 30.6 ± 5.01 |
| Parity (yes %) | 58.8 |
| Planned pregnancy (yes %) | 80.7 |
| Maternal ethnic origin (%) | |
| Caucasian | 81.9 |
| Asian | 0.7 |
| Arab | 7.8 |
| Black | 2.1 |
| Latin American | 7.6 |
| Maternal educational level (%) | |
| Low (primary or less) | 30.1 |
| Medium (secondary) | 38.3 |
| High (university or more) | 31.6 |
| Socioeconomic status (%) | |
| Low | 13.5 |
| Middle | 69.6 |
| High | 16.9 |
| BMI (kg/m2) at first trimester (%) | |
| < 25 | 62.2 |
| 25–30 | 25.3 |
| ≥ 30 | 12.5 |
| Smoking status (%) | |
| Smoker | 15.3 |
| Non-Smoker or Ex-Smoker | 84.7 |
a Mean ± standard deviation. BMI body mass index