In a retrospective study containing 54 premature babies, urinary NT-proBNP levels were higher in the BPD-PH group than in the BPD and control groups, and a cutoff level of 2,345 pg/mL at 28 weeks of GA had a sensitivity and specificity of 83.3 and 84.2%, respectively (33). The gene discussed is NPPB; the disease is bronchopulmonary dysplasia.