NPPB and bronchopulmonary dysplasia: We found that NT-proBNP levels day three were higher in neonates who developed BPD or died compared to neonates that did not (11,607 ng/l (95% CI: 8,053; 16,728) vs 3,495 ng/l (95% CI: 2,712; 4,504), p < 0.001).