Using multivariable analysis to adjust for potential confounders , our objective was to compare two outcomes : @ ) composite neonatal morbidity ( Apgar score @ or less at @ minutes , seizure , sepsis , necrotizing enterocolitis grade II or III , intraventricular hemorrhage grade III or IV , or death before discharge ) and @ ) neurologic injury ( cerebral palsy ) at @ years or more of corrected age between the groups .