Table 1

Baseline maternal and infant characteristics

High flow (n=59)nCPAP (n=61)
Gestational age, weeks28 (27–29)28 (27–29)
 <27 weeks’ gestation at birth14 (23)12 (19)
Birth weight (g)1115 (932–1347)1132 (965–1290)
Male26 (44)34 (55)
Ethnicity
 New Zealand European6 (10)9 (14)
 Māori21 (35)18 (29)
 Pacific Peoples16 (27)21 (34)
 Asian13 (22)13 (21)
 Other3 (5)0 (0)
Multiple birth9 (15)14 (23)
Apgar score at 5 min8 (7–9)8 (7–9)
Antenatal corticosteroids
 Completed34 (57)48 (78)
Prolonged rupture of membranes (≥18 hours)11 (19)19 (31)
Chorioamnionitis*22 (37)21 (34)
Antepartum haemorrhage20 (33)25 (41)
Maternal pre-eclampsia10 (16)12 (19)
Maternal diabetes mellitus8 (13)5 (8)
Emergency caesarean section35 (59)40 (65)
Resuscitation at birth
 Intermittent positive pressure ventilation39 (66)34 (55)
 Intubation14 (23)5 (8)
 Chest compressions4 (6)0 (0)
 Emergency central lines and epinephrine1 (1)0 (0)
Minimal one dose surfactant received30 (51)28 (45)
Clinical Risk Index for Babies (CRIB II) score7 (5.5–9)7 (5–9)
Prerandomisation
 Patent ductus arteriosus requiring medical treatment5 (8)5 (8)
 Early onset sepsis†0 (0)0 (0)
 Mechanical ventilation20 (34)12 (20)
 Time on mechanical ventilation (hours)41 (20–128)57 (29–186)
 Time on nCPAP 7–9 cm water (hours)105 (40–310)72 (27–284)
Postmenstrual age at randomisation30 (29–32)30 (29–31)
  • Data shown as median (IQR) or number (%).

  • *Defined on histology by pathologist.

  • †Australia and New Zealand Neonatal Network definition 2015.

  • nCPAP, nasal continuous positive airway pressure.