RESUMO
Objective:To investigate the risk factors and establish a risk scoring system for bronchopulmonary dysplasia (BPD) in very and extremely preterm infants.Methods:From December 2013 to December 2018, 254 very and extremely preterm infants with less than 32 weeks of gestation hospitalized for 28 d and above in the Third Staff Hospital of Baotou Steel Group were retrospectively enrolled. According to the diagnostic criteria of BPD, they were divided into the BPD group ( n=129) or the non-BPD group ( n=125). Clinical data and the risk factors for BPD were analyzed with univariate t-test, Chi-square test, rank-sum test, and multivariate logistic regression analysis. Based on the results, the risk scoring system was evaluated by receiver operating characteristic (ROC) curve, sensitivity, and specificity. Results:Logistic regression analysis showed that gestational age, neonatal respiratory distress syndrome (NRDS), ventilator-associated pneumonia (VAP), and duration of ventilation >7 d were the risk factors for BPD (all P<0.05). When the area under the ROC curve was 0.868 (95% CI: 0.823-0.913, P<0.001) and the maximum Youden index was 0.644, the sensitivity of the scoring systems for BPD was 0.884 (95% CI: 0.812-0.931), and the specificity was 0.760 (95% CI: 0.674-0.830). Conclusions:Gestational age, NRDS, VAP, and prolonged duration of ventilation were the risk factors for BPD. The risk scoring system established has the prediction value on BPD in very and extremely preterm infants.