Overall n=84 Induced onset of labor n=48 Spontaneous onset of labor n=36
p value
Gestational age at delivery, weeks (±SD) 36.2 ± 1.28 36.6 ± 0.70 35.4 ± 1.39 0.001
Composite perinatal morbidity, n(%)3 3 (3.6) 0 3 (8.3) 0.08
First twin 2 (4.8) 0 2 (11.1) 0.18
Second twin 1 (2.4) 0 1 (5.6) 0.43
> 34 week’s 2/80 (2.5) 0/48 2/32 (6.3) 0.16
> 36 week’s 1/56 (1.8) 0/42 1/14 (7.1) 0.25
5-minute Apgar score <4 0 0 0 -
5-minute Apgar score <7 1 (1.2) 0 1 (2.9) 0.43
Neonatal death 0 0 0 -
Respiratory morbidity (respiratory distress síndrome and/or bronchopulmonary dysplasia) 0 0 0 -
Intraventricular hemorrhage 2 (2.4) 0 2 (5.6)* 0.18
Periventricular leukomalacia 0 0 0 -
Necrotizing enterocolitis 0 0 0 -
Sepsis 0 0 0 -
2-year-Neurodevelopmental impairment, n(%) 4/81 (4.9) 0/47 4/34 (11.8) 0.03
Severe neurodevelopmental impairment 0/81 0/47 0/34 -