Moreover, the Ang-1 concentration level in the BPD group was lower than that in the non-BPD group (7105.43 (5617.01–8523.00) pg/ml vs. 10488.03 (7946.19–15962.77) pg/ml, respectively, P = 0.027). This evidence concerns the gene ANGPT1 and bronchopulmonary dysplasia.