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High incidence of status epilepticus and ongoing seizures on arrival to the hospital due to high prevalence of febrile seizures in Izumo, Japan: A questionnaire-based study.

Brain & Development 2019 November
OBJECTIVES: To determine the incidence of prolonged febrile seizures and status epilepticus in the first three years of life.

METHODS: A questionnaire was sent to 1560 families between April 2016 and March 2017 before their child attended a routine health check at three years of age in Izumo, Shimane prefecture, Japan. The questionnaire included an overview of febrile seizures, including the age at which febrile seizures occurred, the duration, and how the condition was managed.

RESULTS: We received 1089 (69.8%) responses and these showed that 134 (12.3%) children had a history of febrile seizures. Fourteen children with febrile seizures (10.4%) had prolonged seizures lasting 10-30 min and six children (4.5%) had status epilepticus. Ongoing febrile seizures that did not terminate on arrival to the hospital were observed in 11 children (8.2%) with febrile seizures. The incidence rates of status epilepticus, prolonged febrile seizures including status epilepticus and ongoing febrile seizures were 184, 612 and 337 per 100,000 children aged 36 months or less, respectively.

CONCLUSIONS: There was a greater incidence of status epilepticus than previously thought, possibly due to the high prevalence of febrile seizures in Japan. Eight percent of children with febrile seizures were seizing on arrival to the hospital. These ongoing seizures requiring emergency interventions were almost twice more than status epilepticus. Thus, it is necessary to develop an early intervention for the termination of prolonged febrile seizures.

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