Fig. 2From: Surgical ligation of patent ductus arteriosus in preterm neonates weighing less than 1500g: a 9-year single center experienceLogistic regression analysis of risk factors associated with PDA surgical ligation. OR, odds ratio; CI, confidence interval; PDA, patent ductus arteriosus. *Odds ratios were adjusted for gestational age, histologic chorioamnionitis, PIH, Apgar score at 5 min, and PDA ductal diameter > 2.0 mmBack to article page