Baseline Characteristics of the Study Infants
| Birth weight (g) | 979 ± 266 (range: 380–1500) |
|---|---|
| Gestational age (wk) | 27.4 ± 1.7 (range: 24–31) |
| <26 | 4 |
| 27–28 | 14 |
| 29–30 | 2 |
| 31 | 2 |
| Antenatal indomethacin (n) | 0 |
| Antenatal glucocorticoids (n) | 9 |
| Surfactant treatment (n) | 11 |
| 1 dose | 4 |
| 2 doses | 7 |
| 3 doses | 2 |
| High-frequency oscillatory ventilation (n) | 6 (27.3%) |
| Mean airway pressure (cm H2O) | 9.8 ± 1.9 (range: 7–13) |
| Inspired oxygen (%) | 40 ± 13 (range: 25–70) |
| IVH (n) | |
| Grade 1 | 3 (13.6%) |
| Grade 2 | 2 (9%) |
| Grade 3 | 2 (9%) |
| Ductal diameter (mm) | 2.1 ± 0.79 (range: 1.5–3.9) |
| Degree of ductal shunting (n) | |
| Moderate | 17 (77.3%) |
| Severe | 5 (22.7%) |