Introduction: A complex-febrileseizure (CFS) is associated with increased risk of epilepsy. While guidelines are available for simple-febrile-seizure, evaluation and management of CFS is individualized.

Aim and objective: The aim of this study is to assess the clinical characteristics and diagnostic evaluation of children aged 1 month to 5 years presenting with first CFS. The objective is  to determine the utility of various investigations in  first CFS.

Material and Methods:  A prospective study was conducted in the pediatric department of a tertiary hospital. Forty-nine children aged 1 month-5 years with first CFS fulfilling the inclusion criteria were enrolled in the study over duration of 8-months. All the cases were evaluated with Electroencephalography (EEG), CT/MRI and lumbar puncture.

Results and analysis: The investigation results were analyzed with respect to different CFS parameter like type of seizure (focal or generalized) and duration of seizure(less than or more than 15 minutes). CFS is common in the age group of 13 to 36 months. Antipyretics did not affect the chance of a seizure. Upper respiratory tract infection is the main cause of CFS. Hypocalcaemia is not associated with increased risk of CFS. Children with prolonged focal and multiple generalized seizure had abnormal neuroimaging but it was not statistically significant. All children with CFS, whether focal or multiple generalized, whether of long or short duration, had a normal EEG.

Conclusion: We conclude from our study that a child with first CFS may not need EEG and neuroimaging as a diagnostic evaluation test.