This study analyses the prevalence and nature of epilepsy in all children between the ages of 5 and 16 years of age in the City of Sheffield with mild, moderate or severe intellectual impairments. An overall figure of 18% was obtained with a range of 7% for those with mild to moderate intellectual impairments to 67% for those with severe intellectual impairments and a physical disability. The severity of the epilepsy similarly varied with the most severe being in those with severe intellectual impairments and physical disabilities.
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Shepherd et al. (1989) studied this question.
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