This is a secondary analysis of the Randomized Controlled Trial of Magnesium Sulfate for the Prevention of Cerebral Palsy that evaluated whether the study drug ( magnesium or placebo ) that was administered at the time of delivery was associated with increased risk for a composite adverse neonatal resuscitation outcome ( 5-minute Apgar score < 7 , oxygen administration in the delivery room , intubation , chest compressions , hypotension , and hypotonicity ) .