Table 1

Perinatal data for children born extremely preterm

Moderate/severe BPD (mean±SD; n(%))No/mild BPD (mean±SD; n(%))
Gestational age (weeks)*26.0±1.926.7±1.1
Birth weight (g)‡813±191982±163
Maternal age (years)29.6±5.830.3±6.3
Doses of surfactant†2.3±2.11.1±1.8
Days of initial ventilation‡29±226±11
NICU LOS (days)‡104±3265±28
PROM10 (21%)7 (13%)
Antenatal corticosteroids33 (70%)43 (83%)
Clinical chorioamnionitis3 (6%)4 (8%)
Caesarean section*34 (72%)27 (52%)
RDS45 (98%)51 (98%)
PDA requiring surgery*12 (27%)5 (10%)
Postnatal corticosteroids*13 (28%)3 (6%)
  • *p<0.05; †p<0.01; ‡p<0.001.

  • BPD, bronchopulmonary dysplasia; NICU LOS, neonatal intensive care unit length of stay; PDA, patent ductus arteriosus; PROM, premature rupture of membranes >24 h prior to delivery; RDS, respiratory distress syndrome.