RESUMO
Objective To investigate the risk factors which affect complex febrile seizures developing into epilepsy. Methods Retrospective analysis of 162 complex febrile seizure cases was carried out. Results Fifteen out of 35 children who had familial history of epilepsy developed into epilepsy. Twenty out of 55 cases who had neurological abnormalities developed into epilepsy. Nineteen out of 37 cases of who the length between fever and febrile seizure was less than 1 h developed into epilepsy, but only 13 in 125 patients developed into epilepsy when the interval between fever and seizure was more than 1 h. Conclusion The predictive risk factors for complex febrile seizures developing into epilepsies are familial history of epilepsy, abnormal neurological development, and short intervals between fever and febrile seizure activities.