Identification of children with first afebrile seizure for whom neuroimaging is unnecessary

Area of Science:

• Pediatric Neurology
• Emergency Medicine
• Diagnostic Imaging

Background:

• First-time afebrile seizures in children often prompt neuroimaging, such as CT scans, to rule out intracranial abnormalities.
• Determining which children require neuroimaging is crucial to avoid unnecessary radiation exposure and healthcare costs.

Purpose of the Study:

• To identify clinical factors that can predict the absence of intracranial abnormalities in children experiencing their first afebrile seizure.
• To establish criteria for determining when neuroimaging is unnecessary in this pediatric population.

Main Methods:

• Retrospective review of clinical records of 611 children under 19 with a first afebrile seizure.
• Univariate analysis and decision tree analysis (classification and regression tree) to identify risk factors for CT/MRI abnormalities.
• Investigated associations between age, sex, seizure characteristics, and neurological findings with imaging results.

Main Results:

• Only 7.1% of children who underwent CT or MRI showed abnormalities, with 6 having urgent findings.
• Seizure cluster, prolonged seizure duration (>5 min), and focal seizures were significantly associated with imaging abnormalities.
• Decision tree analysis identified seizure cluster, prolonged seizure, neurological disorder, and focal seizure as key predictors of CT abnormalities.

Conclusions:

• Children without seizure clusters, prolonged seizures, or neurological disorders may not require emergency room CT scans.
• Clinical assessment of seizure characteristics and neurological status can guide decisions on the necessity of neuroimaging in children with first afebrile seizures.