Fig. 2

Survival curve of children with BPD and Development of the BPD prognosis model. A (a-e) The survival curve compares the survival probability of BPD patients with or without PH (a), the survival probability of BPD children with severe PH, non-severe PH, and non-PH (b), and the survival probability of severe BPD and non-severe BPD (c), survival probability of non-severe BPD with PH, non-severe BPD without PH, severe BPD with PH, and severe BPD without PH (d), and survival probability of male and female PBD-PH children (e). B The prognosis model evaluates the overall survival in children with BPD. Allocate points to each variable proportionally. Add up the scores of each variable to obtain a total score, and then use the total score to calculate the overall survival predictions for 1-year, 5-year, and 7-year BPD patients. C Children with severe BPD who had pulmonary hypertension and had used epinephrine or norepinephrine and budesonide during hospitalization did not develop severe pneumonia, had 111 days of respiratory support, and had an ALT of 21.9 U/L. The 1-year, 5-year, and 7-year mortality predicted by this prognostic model was 0.455, 0.491, and 0.491, respectively. Abbreviations: ALT, alanine transaminase; BPD, bronchopulmonary dysplasia; PH, pulmonary hypertension