Clinical data of preterm infants.

Data is given as number (percentage) or mean+/−SD (range).1Prenatal steroids if given parenterally before delivery.2Diagnosis of maternal chorioamnionitis was made by postnatal histopathological examination of the placenta.3All infants were off oxygen at time of analysis.4CRIB Score is a postnatal score including birthweight, gestational age, minimum and maximum FiO2 and maximum Base Excess during the first 12 hours as well as malformations. It can range from minimum 0 points to maximum 23 [26].