Characteristics of preterm infants born between 30 and 34 completed gestational weeks (n = 2388)
| Maternal data | |
| Age, years | 31.2 (5.4) |
| Pregnancy data | |
| Antenatal steroid therapy | 876 (37%) |
| Multiplets | 612 (26%) |
| Gestational age (weeks) | 32.8 (1.3) |
| Infant data | |
| Birth weight (g) | 2086 (476) |
| Small for gestational age | 301 (13%) |
| Male sex | 1253 (52%) |
| Neonatal morbidity and treatment | |
| Apgar score 5 minutes <4 | 15 (0.6%) |
| Respiratory distress syndrome | 291 (12%) |
| Mechanical ventilation | 79 (3.3%) |
| Infection | 320 (13%) |
| Antibiotic treatment | 677 (28%) |
| Hypoglycaemia | 430 (18%) |
| Hyperbilirubinaemia (requiring treatment) | 1408 (59%) |
| Patent ductus arteriosus (requiring treatment) | 30 (1.3%) |
| Bronchopulmonary dysplasia (oxygen therapy at 36 weeks of postmenstrual age) | 22 (0.9%) |
| Severe neonatal morbidity* | 34 (1.4%) |
Values are mean (SD) or numbers (proportions).
*Severe neonatal morbidity include infants with one or more of the following diagnoses: retinopathy of prematurity grade 3–4, intraventricular haemorrhage grade 3–4 or bronchopulmonary dysplasia.