Related Experiment Video
Updated: May 9, 2026

A Familiarization Protocol Facilitates the Participation of Children with ASD in Electrophysiological Research
Published on: July 31, 2017
Clinical characteristics of children with autism spectrum disorder and co-occurring epilepsy
Emma W Viscidi1, Elizabeth W Triche, Matthew F Pescosolido
1Department of Epidemiology, Division of Biology and Medicine, Brown University, Providence, Rhode Island, United States of America.
Insights
Epilepsy affects about 12% of children with Autism Spectrum Disorder (ASD), rising to 26% in adolescents. Older age and lower cognitive ability are key risk factors for this comorbidity in ASD patients.
Area of Science:
- Neurodevelopmental Disorders
- Pediatric Neurology
- Autism Spectrum Disorder Research
Background:
- Autism Spectrum Disorder (ASD) is a complex neurodevelopmental condition.
- Epilepsy is a common comorbidity in individuals with ASD, impacting management and prognosis.
- Understanding the prevalence and associated factors of epilepsy in ASD is crucial for clinical practice.
Purpose of the Study:
- To determine the prevalence of epilepsy in children diagnosed with Autism Spectrum Disorder.
- To identify demographic and clinical characteristics associated with epilepsy in this population.
- To investigate independent predictors of epilepsy in children with ASD.
Main Methods:
- A cross-sectional study was conducted involving 5,815 children with ASD across four samples.
- Epilepsy prevalence was estimated using a population-based sample.
- Demographic and clinical data were compared between children with and without epilepsy, with multivariate logistic regression used for analysis.
Main Results:
- The average prevalence of epilepsy in children with ASD (ages 2-17) was 12.5%, increasing to 26% in those aged 13 and older.
- Epilepsy was initially associated with older age, lower cognitive ability, poorer functioning, developmental regression, and more severe ASD symptoms.
- Independent predictors identified were older age (OR 2.35 for age ≥10) and lower cognitive ability (OR 0.53 per SD increase in IQ).
Conclusions:
- This study provides robust evidence on the prevalence of epilepsy in children with ASD, reaching 26% by adolescence.
- Older age and lower cognitive ability are independently associated with epilepsy in children with ASD.
- Findings aid in identifying at-risk individuals and guiding prognosis for co-occurring epilepsy in ASD.
Objectives:
To estimate the prevalence of epilepsy in children with Autism Spectrum Disorder (ASD) and to determine the demographic and clinical characteristics of children with ASD and epilepsy in a large patient population.
Methods:
Cross-sectional study using four samples of children with ASD for a total of 5,815 participants with ASD. The prevalence of epilepsy was estimated from a population-based sample. Children with and without epilepsy were compared on demographic and clinical characteristics. Multivariate logistic regression was used to examine the association between demographic and clinical characteristics and epilepsy.
Results:
The average prevalence of epilepsy in children with ASD 2-17 years was 12.5%; among children aged 13 years and older, 26% had epilepsy. Epilepsy was associated with older age, lower cognitive ability, poorer adaptive and language functioning, a history of developmental regression and more severe ASD symptoms. The association between epilepsy and the majority of these characteristics appears to be driven by the lower IQ of participants with epilepsy. In a multivariate regression model, only age and cognitive ability were independently associated with epilepsy. Children age 10 or older had 2.35 times the odds of being diagnosed with epilepsy (p<.001) and for a one standard deviation increase in IQ, the odds of having epilepsy decreased by 47% (p<.001).
Conclusion:
This is among the largest studies to date of patients with ASD and co-occurring epilepsy. Based on a representative sample of children with ASD, the average prevalence of epilepsy is approximately 12% and reaches 26% by adolescence. Independent associations were found between epilepsy and older age and lower cognitive ability. Other risk factors, such as poor language and developmental regression, are not associated with epilepsy after controlling for IQ. These findings can help guide prognosis and alert clinicians to patients with ASD who are at increased risk for epilepsy.
More Related Videos
10:22Interictal High Frequency Oscillations Detected with Simultaneous Magnetoencephalography and Electroencephalography as Biomarker of Pediatric Epilepsy
Published on: December 6, 2016
09:57Electromagnetic Source Imaging in Presurgical Evaluation of Children with Drug-Resistant Epilepsy
Published on: September 20, 2024
Related Concept Videos
Autism Spectrum Disorder
These core symptoms manifest differently among individuals, ranging from mild to severe. The disorder's complexity extends beyond its clinical presentation, encompassing a diverse range of biological, cognitive, and sociocultural influences.
Epilepsy ll: Types
Epilepsy and Seizures: Overview
Various factors can trigger epilepsy, including genetic factors, brain damage, metabolic causes, and unknown etiology. Diagnosis of epilepsy involves electroencephalography (EEG), which...
Seizures: Classification
Seizures are typically classified into two main categories: focal and generalized seizures.
Focal Seizures
Focal seizures originate from specific regions of the brain. These seizures are further sub-classified into two types:
Seizures l: Introduction
Seizures ll: Types