Table 1

Characteristics of preterm infants born between 30 and 34 completed gestational weeks (nā€Š=ā€Š2388)

Maternal data
Age, years31.2 (5.4)
Pregnancy data
Antenatal steroid therapy876 (37%)
Multiplets612 (26%)
Gestational age (weeks)32.8 (1.3)
Infant data
Birth weight (g)2086 (476)
Small for gestational age301 (13%)
Male sex1253 (52%)
Neonatal morbidity and treatment
Apgar score 5 minutes <415 (0.6%)
Respiratory distress syndrome291 (12%)
Mechanical ventilation79 (3.3%)
Infection320 (13%)
Antibiotic treatment677 (28%)
Hypoglycaemia430 (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 3ā€“4, intraventricular haemorrhage grade 3ā€“4 or bronchopulmonary dysplasia.