Background: Epilepsy is a common neurological disorder in children with a frequency of 3- 6/1000 children. Early identification of the risk of developing uncontrolled epilepsy can achieve a better outcome. Objectives: To determine risk factors that influence an epileptic whether it is controlled or not. Methods: This is a case control study from February to September 2010 over 47 pediatric neurology's outpatients. Results The majority group is uncontrolled epilepsy(57.4%), generalized seizure(91.5%), first onset of seizure >1 year age(51.1%), normal motor development(59.6%), no/better changes in EEG's epileptiform wave(85.1% ), no/better changes in EEG's background(83%). Based on bivariate analysis, there is a significant relationship between EEG's background changes with whether epilepsy becomes controlled or not. Conclusions: The factors that influence whether epilepsy becomes controlled or not respectively are changes in EEG's background, changes in EEG's epileptiform wave, first onset of seizure and motor development.