TABLE 1.

Baseline Characteristics of the Study Infants

Birth weight (g)979 ± 266 (range: 380–1500)
Gestational age (wk)27.4 ± 1.7 (range: 24–31)
 <264
 27–2814
 29–302
 312
Antenatal indomethacin (n)0
Antenatal glucocorticoids (n)9
Surfactant treatment (n)11
 1 dose4
 2 doses7
 3 doses2
High-frequency oscillatory ventilation (n)6 (27.3%)
Mean airway pressure (cm H2O)9.8 ± 1.9 (range: 7–13)
Inspired oxygen (%)40 ± 13 (range: 25–70)
IVH (n)
 Grade 13 (13.6%)
 Grade 22 (9%)
 Grade 32 (9%)
Ductal diameter (mm)2.1 ± 0.79 (range: 1.5–3.9)
Degree of ductal shunting (n)
 Moderate17 (77.3%)
 Severe5 (22.7%)