NPPB and bronchopulmonary dysplasia: Consistently, at the second time point (12 months) NT-proBNP values were still higher in the 6 ELGANs who had chronic BPD-PH despite pharmacotherapy (median: 359, IQR: 356–720 pg/ml vs. median: 87, IQR: 66–125 pg/ml; p = 0.001) (Fig. 3).