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Epidemiology

• Incidence in the U.S.
  • 18–50 cases per 100,000 annually
    • Half are secondary to acute central nervous system (CNS) insult.
    • One-third are unprovoked first seizure.
    • One-sixth are in patients with known epilepsy.
      • Noncompliance with medications is primary risk factor in patients with known epilepsy.
• Prevalence
  • Occurs in ~10% of children who have diagnosis of epilepsy
• Age
  • More common in children, especially in first year of life
  • More common in patients older than age 60
• Sex
  • Occurs equally in males and females
    

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