Table 3 Secondary study variables (n = 16)
VariablesVariable flow NCPAPNIPPV/variable flow NCPAPConventional NCPAP underwater bubble systemNIPPV/conventional ventilator
Rate of central apnoeas per hour3.7 (1.1–26.4)4.5 (0.7–26.7)6.4 (0.9–24.1)3.4 (1.1–19.5)
Rate of desaturation events per hour1.6 (0.0–36.2)2.8 (0.0–21.9)3.6 (0.0–24.3)5.0 (0.0–44.8)
Rate of bradycardias per hour0.4 (0.0–3.1)0.4 (0.0–4.4)0.8 (0.0–6.3)0.7 (0.0–3.0)
Baseline respiratory rate (1/min)53 (35–89)56 (28–93)54 (33–93)56 (34–84)
Baseline heart rate (beats per minute)165 (144–178)163 (145–180)*163 (150–177)*167 (150–181)
Baseline SpO2 (%)97 (95–99)*96 (95–99)*96 (95–99)*96 (93–98)
Relative cumulative event time (%)0.4 (0.0–5.4)0.4 (0.0–2.6)1.1 (0.1–3.4)0.8 (0.0–7.4)
  • Data are expressed as median (minimum–maximum); NCPAP, nasal continuous positive airway pressure; NIPPV, nasal intermittent positive pressure ventilation; SpO2, pulse oximeter saturation.

  • *p Value<0.05 for the comparison with the conventional ventilator as reference.