Table 4

Outcomes if gestational age ≤32 weeks

OutcomeFlow driver (n=25)Bubble (n=28)Effect*95% CI
CPAP days, GM†0.820.55 to 1.241.461.00 to 2.131.61.0 to 2.8
CPAP plus supplementary oxygen days, GM†3.121.92 to 5.075.253.27 to 8.451.60.9 to 2.9
Necrotising enterocolitis, n %14%00%
Retinopathy of prematurity, n %00%00%
Periventricular leucomalacia, n %00%27%
Periventricular haemorrhage, n %28%518%2.30.4 to 14
Death, n %14%311%2.30.2 to 28
Ventilation, n %28%621%2.90.5 to 17
Nasal excoriation, n %14%311%2.70.3 to 28
Pneumothorax, n %14%311%2.60.2 to 27
  • *ORs for binary outcomes, adjusted for gestational age; ratio for log transformed continuous outcomes, adjusted for gestational age, sex, antenatal steroids.

  • †GM and 95% CI, for survivors.

  • CPAP, continuous positive airway pressure; GM, geometric mean.