ductus arteriosus (PDA) treatment rates (pharmacologic or surgical) and neonatal outcomes.
Study design This cohort study included infants born at 24-28 weeks of gestation and birth
weight< 1500 g in 2007-2015 in NICUs caring for≥ 100 eligible infants in 6 countries. The
ratio of observed/expected (O/E) PDA treatment rates was derived for each NICU by
estimating the expected rate using a logistic regression model adjusted for potential …