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A population-based study on epilepsy in mentally retarded children
E M Airaksinen1, R Matilainen, T Mononen
1Department of Paediatrics, Kuopio University Hospital, Finland. eila.airaksinen@uku.fi
Epilepsia
|September 22, 2000
Summary
The cumulative risk of epilepsy in mentally retarded children by age 22 is 21%. Epilepsy risk is higher in severe cases and associated with causes like cerebral palsy, with a 32% remission rate by age 22.
Area of Science:
- Neurology
- Pediatric Neurology
- Epidemiology
Background:
- Epilepsy is a common comorbidity in children with intellectual disabilities.
- Understanding the long-term risk and remission rates of epilepsy in this population is crucial for clinical management and prognosis.
Purpose of the Study:
- To determine the cumulative risk, causes, comorbidities, and remission rates of epilepsy in mentally retarded (MR) children followed until age 22.
- To investigate factors influencing epilepsy risk and remission in relation to the severity and cause of intellectual disability.
Main Methods:
- A longitudinal study of 151 mentally retarded children identified at ages 8-9 from birth cohorts (n=12,882).
- Epilepsy data collected at ages 9-10, 17, and 22, adhering to International League Against Epilepsy guidelines.
- Risk factors analyzed included severity of intellectual disability, postnatal causes, and cerebral palsy.
Main Results:
- The cumulative risk of epilepsy by age 22 was 21%.
- Severely MR children had a fivefold increased risk compared to mildly MR children (35% vs. 7%).
- Postnatal causes and cerebral palsy increased epilepsy risk, particularly in mildly MR children. Epilepsy remission by age 22 was 32%.
Conclusions:
- Epilepsy risk in MR children is significantly influenced by the severity and etiology of intellectual disability, and co-occurring conditions.
- The probability of epilepsy remission increases with age in this cohort.