Baseline Comparison of Children Who Were Followed up at Age 6.5 Years in Experimental Versus Control Groups
| Variable | Experimental (n = 7108) | Control (n = 6781) |
|---|---|---|
| Maternal age, %, y | ||
| <20 | 14.3 | 13.2 |
| 20–34 | 81.4 | 82.6 |
| ≥35 | 4.3 | 4.2 |
| Maternal education, % | ||
| Incomplete secondary | 4.4 | 3.0 |
| Complete secondary | 34.3 | 29.7 |
| Advanced secondary or partial university | 47.8 | 54.5 |
| Complete university | 13.5 | 12.9 |
| Older children living in household, % | ||
| 0 | 58.8 | 54.5 |
| 1 | 33.3 | 36.1 |
| ≥2 | 7.9 | 9.4 |
| Maternal smoking during pregnancy, % | 2.6 | 1.6 |
| Child gender (% male) | 51.4 | 52.0 |
| Birth weight, mean ± SD, g | 3440 ± 418 | 3441 ± 423 |