Fig. 2From: Patent ductus arteriosus, systemic NT-proBNP concentrations and development of bronchopulmonary dysplasia in very preterm infants: retrospective data analysis from a randomized controlled trialROC-curves describing N-terminal pro-brain natriuretic peptide cut-off values for the prediction of BPD/death at the median age of 2 and 8 days in very preterm infants with PDA (the first measurement - 2-3 days of life; the second measurement - 8-9 days of life)Back to article page