Occurrence and outcome of epilepsy in children younger than 2 years

OBJECTIVE: To analyze the occurrence of epilepsy between the ages of 28 days and 2 years and the outcome of children with the onset of epilepsy at that age. STUDY DESIGN: The study included all children who were born between January 1, 1976, and December 31, 1986, in an area with a mean annual live birth rate of 5027 and who were treated for epilepsy at that age. Follow-up data were gathered from medical records and/or with a questionnaire. RESULTS: By age 2 years, 72 children had epilepsy, giving a cumulative incidence rate of 1.3 cases per 1000 children (95% CI, 1.0-1.6). Thirty-two (97.0%) of the 33 children with cryptogenic epilepsy were without medication at the time of the last visit and had been in remission for a mean period of 13.0 years (range, 7.4-19.7 years), in contrast to only 5 (15.6%) of the 32 children with symptomatic epilepsy (difference, 81.3%; 95% CI of the difference, 63.0%-91.3%; P <.0001). In the logistic regression model, the type of the epilepsy (symptomatic/cryptogenic) was the only variable that explained the persistence of epilepsy during the follow-up (P <.05). Thirty-one (93.9%) of the 33 children with cryptogenic epilepsy were mentally normal, as opposed to only 3 (9.4%) of the 32 children with symptomatic epilepsy (difference 84. 6%; 95% CI of the difference, 66.3%-93.4%; P <.0001). CONCLUSION: The outcome of children whose epilepsy starts between the ages of 28 days and 2 years is determined by the underlying brain disease, and the outcome is good in cryptogenic cases.