Table 2

Neonatal information about the preterm participants

 PretermPreterm
No BPDBPD
Gestational age (PMA)28.0 (25.0, 29.6)29.8 (28.6, 31.0)26.0 (24.4, 27.6)*
Birth weight (g)955 (755, 1335)1388 (1186, 1645)825 (700, 955)*
Birth weight z-score (mean, SD)−0.14 (0.91)0.00 (0.95)−0.22 (0.88)
Birth length (cm)35.5 (33.0, 39.5)40.0 (38.0, 42.0)34.0 (32.0, 36.0)*
Duration of oxygen supplementation (days)48 (2, 92)1 (0, 3.8)85 (59, 103)*
Duration of mechanical ventilation (days)4 (0, 28)0 (0, 1)20 (5, 39)*
Duration of CPAP (days)6 (1, 18)1 (0, 3.7)14 (4, 24)*
Surfactant administered, n (%)115 (70.6)27 (42.7)88 (89.8)*
Antenatal steroids, n (%)133 (81.6)53 (82.8)80 (81.6)
  • *Represents significant difference between the preterm groups with and without BPD (p<0.05). Continuous neonatal variables are presented as median (IQR), except birth weight z-score (mean, SD). Binary variables are expressed as n (%).Birth weight z-score was calculated from Fenton growth charts for preterm infants.23

  • BPD, bronchopulmonary dysplasia; PMA, postmenstrual age.