Abstract:Objective To investigate the clinical characteristics and risk factors of premature infants with bronchopulmonary dysplasia (BPD), so as to provide a theoretical basis for the clinical treatment and prevention of premature infants with BPD. Methods The data of the 168 cases of hospitalized premature infants with gestational ages under 34 weeks were retrospectively analyzed, and infants were divided into two groups according to the presence or absence of BPD, named observation group (n?=?52) and control group (n?=?116). The incidence of BPD, and its relationship with gestational age, birth weight and intrauterine development, as well as the risk factors including repeated pulmonary infection, mechanical ventilation time, oxygen inhalation time, prenatal infection, and intracranial hemorrhage were analyzed, including single factor and multiple factor analysis. Results The incidence rates of preterm infants with gestational age ≤ 28 w, to 30 w, to 32 w, and to 34 w were 55.88%, 39.13%, 19.51% and 14.89%, respectively. The incidence rates of BPD in premature infants was ≥ 1000?g, to 1?500?g, to 2?000?g and >?2?000?g were 66.67%, 38.46%, 20.41% and 14.00%, respectively, and the difference was statistically significant (P?0.05); BPD was associated with prenatal infection, postnatal mechanical ventilation, oxygen inhalation time and repeated lung infections (P?0.05), but not with intracranial hemorrhage (P?>?0.05). The mechanical ventilation time and oxygen inhalation time of the observation group were significantly higher than those of the control group, and the difference was not significant (P?0.05). Conclusion Normal intrauterine growth of fetus, decreasing lung infections through a rational application of mechanic ventilation is important measures to prevent the BPD from premature infants.