Population-based study of seizure disorders after cerebral infarction

E. L. So, J. F. Annegers, W. A. Hauser, P. C. O'Brien, J. P. Whisnant

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Abstract

We performed the first population-based study that determined the magnitude of the risk and identified the factors predictive of developing seizure disorders after cerebral infarction. Five hundred thirty-five consecutive persons without prior unprovoked seizures were followed from their first cerebral infarctions until death or migration out of Rochester, Minnesota. Thirty-three patients (6%) developed early seizures (within 1 week), 78% of which occurred within the first 24 hours after infarction. Using multivariate analysis, the only factor predictive of early seizure occurrence was anterior hemisphere location of infarct (odds ratio 4.0; 95% CI 1.2 to 13.7). Twenty-seven patients developed an initial late seizure (past 1 week), whereas 18 developed epilepsy (recurrent late seizures). Compared with the population in the community, the risk during the first year was 23 times higher for initial late seizures and 17 times higher for epilepsy. The cumulative probability of developing initial late seizures was 3.0% by 1 year, 4.7% by 2 years, 7.4% by 5 years, and 8.9% by 10 years. Independent predictive factors on multivariate analysis for initial late seizures were early seizure occurrence (hazard ratio of 7.8 [95% CI 2.8 to 21.7]) and stroke recurrence (3.1 [1.2 to 8.3]). Both early seizure occurrence (16.4 [5.5 to 49.2]) and stroke recurrence (3.5 [1.2 to 10.5]) independently predicted the development of epilepsy as well. We also found that early seizure occurrence predisposed those with initial late seizures to develop epilepsy.

Original languageEnglish (US)
Pages (from-to)350-355
Number of pages6
JournalNeurology
Volume46
Issue number2
StatePublished - Feb 1996

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Cerebral Infarction
Epilepsy
Seizures
Population
Multivariate Analysis
Stroke
Recurrence
Infarction
Odds Ratio

ASJC Scopus subject areas

  • Neuroscience(all)

Cite this

So, E. L., Annegers, J. F., Hauser, W. A., O'Brien, P. C., & Whisnant, J. P. (1996). Population-based study of seizure disorders after cerebral infarction. Neurology, 46(2), 350-355.

Population-based study of seizure disorders after cerebral infarction. / So, E. L.; Annegers, J. F.; Hauser, W. A.; O'Brien, P. C.; Whisnant, J. P.

In: Neurology, Vol. 46, No. 2, 02.1996, p. 350-355.

Research output: Contribution to journalArticle

So, EL, Annegers, JF, Hauser, WA, O'Brien, PC & Whisnant, JP 1996, 'Population-based study of seizure disorders after cerebral infarction', Neurology, vol. 46, no. 2, pp. 350-355.
So EL, Annegers JF, Hauser WA, O'Brien PC, Whisnant JP. Population-based study of seizure disorders after cerebral infarction. Neurology. 1996 Feb;46(2):350-355.
So, E. L. ; Annegers, J. F. ; Hauser, W. A. ; O'Brien, P. C. ; Whisnant, J. P. / Population-based study of seizure disorders after cerebral infarction. In: Neurology. 1996 ; Vol. 46, No. 2. pp. 350-355.
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