Table 2. Clinical data of preterm infants.
| Healthy preterm | Bronchopulmonary dysplasia | |||
| mild | moderate | severe | ||
| Number of subjects | 58 | 44 | 53 | 30 |
| Prenatal steroids1 | 44 (76) | 36 (86) | 46 (88) | 24 (86) |
| Chorioamnionitis2 | 9 (16) | 25 (57) | 20 (38) | 11 (41) |
| Prenatal smoking | 1 of 52 (2) | 8 of 41 (20) | 8 of 45 (18) | 3 of 22 (14) |
| Endotracheal intubation | 22 (38) | 28 (64) | 40 (75) | 22 (73) |
| Continuous positive airway pressure (CPAP) | 42 (72) | 43 (98) | 52 (98) | 30 (100) |
| APGAR 5 min | 8.4+1.2 (5–10) | 7.7+1.4 (2–10) | 6.8+1.7 (2–9) | 7.4+2.1 (3–10) |
| APGAR 10 min | 8.9+1.0 (5–10) | 8.3+1.0 (5–10) | 7.7+1.5 (3–9) | 8.6+1.3 (6–10) |
| Days of supplementary oxygen3 | 8+7 (0–27) | 46+13 (28–72) | 78+29 (3–200) | 144+108 (33–508) |
| CRIB Score4 | 1.4+1.8 (0–9) | 4.1+3.1 (0–12) | 5.3+4.0 (1–14) | 6.0+3.3 (1–13) |
Data is given as number (percentage) or mean+/−SD (range).
1
Prenatal steroids if given parenterally before delivery.
2
Diagnosis of maternal chorioamnionitis was made by postnatal histopathological examination of the placenta.
3
All infants were off oxygen at time of analysis.
4
CRIB Score is a postnatal score including birthweight, gestational age, minimum and maximum FiO2 and maximum Base Excess during the first 12 hours as well as malformations. It can range from minimum 0 points to maximum 23 [26].