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Long-term use of the ketogenic diet in the treatment of epilepsy

  • Darcy K Groesbeck (a1), Renee M Bluml (a2) and Eric H Kossoff (a2)
Abstract

Long-term outcomes of the ketogenic diet in the treatment of epilepsy have not previously been reported. A retrospective chart review of children treated with the ketogenic diet for more than 6 years at the Johns Hopkins Hospital was performed. The response was documented at clinic visits and by telephone contacts; laboratory studies were obtained approximately every 6 to 12 months. Satisfaction and tolerability were assessed by means of a brief parental telephone questionnaire. In all, 28 patients (15 males, 13 females), currently aged 7 to 23 years, were identified. The median baseline seizure frequency per week at diet onset was 630 (range 1–1400). Diet duration ranged from 6 to 12 years; 19 remain on the diet currently. After 6 years or more, 24 children experienced a more than 90% decrease in seizures, and 22 parents reported satisfaction with the diet's efficacy. Ten children were at less than the 10th centile for height at diet initiation; this number increased to 23 at the most recent follow-up (p=0.001). Kidney stones occurred in seven children and skeletal fractures in six. After 6 years or more the mean cholesterol level was 201mg/dl, high-density lipoprotein was 54mg/dl, low-density lipoprotein was 129mg/dl, and triglycerides were 97mg/dl. Efficacy and overall tolerability for children are maintained after prolonged use of the ketogenic diet. However, side effects, such as slowed growth, kidney stones, and fractures, should be monitored closely.

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Corresponding author
Suite 2158, 200 North Wolfe Street, The Johns Hopkins Hospital, Baltimore, MD 21287, USA. E-mail: ekossoff@jhmi.edu
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Developmental Medicine and Child Neurology
  • ISSN: 0012-1622
  • EISSN: 1469-8749
  • URL: /core/journals/developmental-medicine-and-child-neurology
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