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Int J Clin Pract. 2001 Sep;55(7):442-4.

Age of seizure onset in adults with Down's syndrome.

Author information

  • 1MRC Clinical Sciences Centre, Imperial College School of Medicine, Hammersmith Hospital, London, UK.

Abstract

In a cohort of 68 adults (35 males and 33 females) with Down's syndrome aged 29-83 years, a history of seizures was found in 26.5%. The overall mean age of onset of seizures was 37 years, males (22 years) being significantly younger than females (51 years). The age of onset was bimodally distributed, with the first peak occurring in the first two decades, and a late-onset peak occurring in the fifth and sixth decades. A strong association between Alzheimer's disease and seizures was confirmed. Of those with a history of seizures, those aged over 45 years were significantly more likely to develop Alzheimer's disease than those younger than 45. It is suggested that late-onset epilepsy in Down's syndrome is associated with Alzheimer's disease, while early-onset epilepsy is associated with an absence of dementia.

PMID:
11594252
[PubMed - indexed for MEDLINE]
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