Based on pathway enrichment analysis (Table 4), genes altered in BPD blood cells were mainly enriched in cell cycle regulation and arrest (e.g., PPP2CA, RBL2, CENPU, CCNY, CDK6) and pulmonary disorder and developmental disorders (e.g., AGER, ITGA6, CA4, BACH2, IGFBP2, BMPR2, SKI, DAB2). This evidence concerns the gene CDK6 and bronchopulmonary dysplasia.