Fig. 4From: Surgical ligation of patent ductus arteriosus in preterm neonates weighing less than 1500g: a 9-year single center experiencePostoperative clinical outcomes of the patients (early ligation versus late ligation). OR, odds ratio; CI, confidence interval; IVH, intraventricular hemorrhage; NEC, necrotizing enterocolitis. Data are the mean ± SD or number (%).*Odds ratios were adjusted for cesarean delivery, weight on PDA ligation, and PDA ductal diameter > 2.0 mmBack to article page