Differences in WBC, NEU, MLR, HGB, lymphocytes, monocytes, HCT, RBC, PLT, NLR, PLR, MPV, RDW, PDW, CRP, and SIRI in BPD and non-BPD patients were analyzed in the BPD and non-BPD groups. Here, CRP is linked to bronchopulmonary dysplasia.