Of the infants requiring rescue within the first 14 days after the first dose of study drug, no statistically significant difference was observed between the NeoProfen and placebo groups for mean age at start of first rescue treatment (8.7 days, range 4-15 days, for the NeoProfen group and 6.9 days, range 2-15 days, for the placebo group).

The groups were similar in the number of deaths by day 14, the number of patients on a ventilator or requiring oxygenation at day 1, 4 and 14, the number of patients requiring surgical ligation of their PDA (12%), the number of cases of Pulmonary Hemorrhage and Pulmonary Hypertension by day 14, and Bronchopulmonary Dysplasia at day 28. In addition, no significant differences were noted in the incidences of Stage 2 and 3 Necrotizing Enterocolitis, Grades 3 and 4 Intraventricular Hemorrhage, Periventricular Leukomalacia and Retinopathy of Prematurity between groups as determined at 36±1 weeks adjusted gestational age.

Two supportive studies also determined that ibuprofen, either prophylactically (n=433, weight range: 400 - 2165 g) or as treatment (n=210, weight range: 400 - 2370 g), was superior to placebo (or no treatment) in preventing the need for rescue therapy for a symptomatic PDA.

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