Characteristics of study infants (values are mean (SEM)*or absolute number (%)†)
| Group 1 | Group 2 | |
|---|---|---|
| Male:female† | 18:14 | 15:16 |
| Gestation (weeks)*: | 28.1 (0.7) | 28.5 (0.5) |
| Range | 23.1-34.6 | 23.3-33.6 |
| Median | 28.6 | 28.6 |
| Birth weight (g)*: | 1123 (81) | 1163 (66) |
| Range | 540-1950 | 555-1900 |
| Median | 1145 | 1150 |
| Apgar score at 5 minutes†: | ||
| ≤ 3 | 2 (6.3) | 1 (3.2) |
| 4-6 | 5 (15.6) | 4 (12.9) |
| ≥ 7 | 25 (78.1) | 26 (83.9) |
| Pre-treatment mean arterial pressure (mm Hg)* Paw | 26.0 (0.8) | 26.5 (0.7) |
| Pre-treatment Paw × FIO2 (cm H2O)* | 5.07 (0.7) | 4.55 (0.7) |
| Diagnosis†: | ||
| Respiratory distress syndrome | 32 (100) | 31 (100) |
| Clinical sepsis | 3 (9.4) | 4 (12.9) |