Characteristics of Participating Infants and Their Mothers of the Main and Additional Studies
| Characteristic | Study A (N = 200) | Study B (N = 50) |
|---|---|---|
| Infant | ||
| Male, n (%) | 93 (46.5) | 24 (48.0) |
| Birth weight, mean ± SD, g | 3392 ± 296 | 3421 ± 259 |
| Gestational age, mean ± SD, wk | 39.7 ± 0.9 | 39.2 ± 0.8 |
| Apgar score of >8 at 5 min, n (%) | 199 (99.5) | 49 (98.0) |
| Breastfed, n (%) | 185 (92.5) | 44 (88.0) |
| Age at the test, mean ± SD, h | 45.0 ± 6.6 | 44.4 ± 6.9 |
| Mother | ||
| Age, mean ± SD, y | 29.9 ± 4.7 | 28.1 ± 3.8 |
| First delivery, n (%) | 102 (51.0) | 23 (46.0) |