Sun J, Weng B, Zhang X, et al. - In very-low-birth-weight infants (VLBWIs), specific risk factors for bronchopulmonary dysplasia associated pulmonary hypertension (BPD-PH) are: patent ductus arteriosus (OR 13.355) and birth weight (OR 0.995).

• This is a retrospective case–control observational study including 83 VLBWIs with bronchopulmonary dysplasia (BPD) who were divided into pulmonary hypertension (PH) group (n = 18) or non-PH group (n = 65).

• Significantly lower birth weight was seen in BPD-PH infants vs non-PH group.

• A higher incidence of patent ductus arteriosus and longer durations of oxygen therapy and mechanical ventilation were reported in infants in the PH group vs the non-PH group.