Table 2 Baseline maternal and neonatal characteristics.

Gestationalage in weeks^a

31.4 ± 1.7

31.4 ± 1.6

0.96

Birth weight in grams^a

1491 ± 321

1531 ± 394

0.41

IUGR^b

29 (25.9)

31 (26.5)

0.92

Gestation age strata^b

28–30 weeks

33 (29.5)

34 (29.1)

0.95

31–34 weeks

86 (71)

88 (69)

Male sex^b

65 (58)

67 (57.3)

0.91

Apgar score at 5 min^c

8 (7–8)

8 (8–8)

0.49

SNAPPE-II score^c

5 (1.25–5)

5 (0–5)

0.87

Any antenatal steroid^b

110 (98.2)

115 (98.3)

0.97

Caesarean^b

96 (85.7)

108 (92.3)

0.11

Singleton^b

57 (50.9)

72 (61.5)

0.25

Respiratory Distress Syndrome^b

68 (60.7%)

77 (65.8%)

0.42

Age at enrolment (h)^a

0.48 ± 0.16

0.47 ± 0.09

0.36

SAS score at randomization^c

5 (5–6)

5 (5–5)

0.35

Post-randomization surfactant^b

60 (53.6)

67 (57.3)

0.57

FiO₂ at enrolment^c

0.3 (0.3–0.3)

0.3 (0.25–0.3)

0.5

Pressure at enrolment^c

5 (5–5)

5 (5–5)

0.43

Age at 1st dose surfactant (h)^c

1 (0.75–1)

1 (0.75–1)

0.83

Maximum FiO₂ on CPAP^c

0.3 (0.3–0.3)

0.3 (0.25–0.3)

0.54

Maximum CPAP (cmH20)^c

6 (5–6)

5 (5–6)

0.68