Infant characteristics
| Perinatal Variable | Summary (N = 144 Infants) |
|---|---|
| Gestational age (mean) (SD) (wk) | 27.7 (1.5) |
| Birth weight (mean) (SD) (g) | 1017 (259) |
| Small for gestational age, birth weight <−2 SDs (No.) (%) | 16 (11) |
| Female (No.) (%) | 75 (52) |
| Multiple gestations (No.) (%) | 64 (44) |
| Cesarean delivery (No.) (%) | 106 (74) |
| Antenatal corticosteroids (No.) (%) | 134 (93) |
| Antenatal magnesium sulfate (No.) (%) | 103 (72) |
| Respiratory distress from birth (No.) (%) | 141 (98) |
| Surfactant (No.) (%) | 91 (63) |
| Duration of positive pressure ventilation (median) (25th–75th centile) (days) | 19 (0–96) |
| Duration of supplemental oxygen (median) (25th–75th centile) (days) | 19 (4–56) |
| Bronchopulmonary dysplasiaa (No.) (%) | 46 (32) |
| Postnatal corticosteroids (No.) (%) | 18 (13) |
| Intraventricular hemorrhage, grades I or II (No.) (%) | 25 (17) |
| Retinopathy of prematurity (No.) (%) | 32 (22) |
| Sepsis confirmedb (No.) (%) | 20 (14) |
| NEC (No.) (%) | 17 (12) |
| Sepsis confirmed and/or NEC (No.) (%) | 31 (22) |
| Survived to discharge home (No.) (%) | 139 (97) |