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Neonatal Characteristics by Gestational Age Group (n, %)
| Characteristic | 22–24 wk (n = 3631) | 25–27 wk (n = 5227) |
|---|---|---|
| Birth weight, g | ||
| 401–500 | 634 (18) | 183 (4) |
| 501–750 | 2666 (73) | 1757 (34) |
| 751–1000 | 331 (9) | 3287 (63) |
| Female sex | 1658 (46) | 2614 (50) |
| SGA at birth | 162 (4) | 564 (11) |
| Race | ||
| White | 1884 (52) | 2796 (54) |
| African American | 1527 (42) | 2160 (41) |
| Other | 178 (5) | 235 (5) |
| Antenatal corticosteroids | 2263 (62) | 4551 (87) |
SGA, small for gestational age.
