A multivariate analysis of perinatal events occurring in infants with neonatal seizures who were enrolled in the National Collaborative Perinatal Project allowed prediction of outcome. This prediction of death or of mental retardation, cerebral palsy, or epilepsy was empirically confirmed 64% to 83% of the time. In an infant with neonatal seizures, a five-minute Apgar score of less than 7, the need for resuscitation after 5 minutes of age, the onset time of the seizures, and a seizure lasting more than 30 minutes are the best early predictors of which infants will die or will have significant neurologic sequelae. It is hypothesized that neonatal seizures may be a better indicator of the severity or duration of intrauterine asphyxia than the Apgar score. In the neonate with seizures, the use of the formula may allow identification of infants at high risk for adverse outcomes.

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