Clinical characteristics of infants studied (n=37)
| Characteristic | Number (%) |
|---|---|
| Gender, males | 21 (57) |
| Gestational age at birth | |
| 23–24 weeks | 9 (24) |
| 25–26 weeks | 17 (46) |
| 27 weeks | 11 (30) |
| Foetal growth restriction | 7 (19) |
| Antenatal betamethasone | 33 (89) |
| Chorioamnionitis (n=35) | 5 (14) |
| Caesarean section | 15 (41) |
| Apgar score 1 min <7 (n=36) | 24 (67) |
| Apgar score 5 min <7 (n=36) | 10 (28) |
| Surfactant treated | 23 (62) |
| Patent ductus arteriosus, treated* | 23 (62) |
| Retinopathy of prematurity, grade 3–4 (n=34) | 9 (26) |
| Septicaemia, verified or suspected | 14 (38) |
| Days in continuous positive airway pressure (CPAP) | |
| <30 | 8 (22) |
| 30–60 | 15 (41) |
| >60 | 14 (38) |
| Mechanical ventilation | 29 (78) |
| >7 days | 13 (35) |
| Postnatal steroids, by inhalation or systemic | 22 (59) |
| Bronchopulmonary dysplasia | 24 (67) |
| severe | 12 (32) |
| moderate | 11 (30) |
| none or mild | 14 (38) |
| Discharged with oxygen supplementation | 12 (32) |
*By surgical closure or indomethacin.