Table 2: Selected birth characteristics.
| Characteristic | Mean ± SD | Range |
|---|---|---|
| Maternal age at delivery, yr | 31.4 ± 5.1 n = 424 |
18-46 |
| Gestational age, wk | 39.1 ± 1.3 n = 423 |
36-42 |
| Birth weight, g | 3263 ± 493.0 n = 422 |
2268-4610 |
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