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We prospectively studied the reliability and accuracy of the electroencephalogram as a predictor of the risk of recurrence within 2 years in 157 patients with untreated idiopathic first seizures.In all patients,a standard electroencephalogram and,if necessary,an electroencephalogram after partial sleep deprivation were obtained.All electroencephalograms were scored by one observer according to a fixed protocol.The finding of epileptic discharges was associated with a risk of recurrence of 83%(95%)confidence interval,69%to 97%)vs.41%(95%confidence interval 29%to 53%)in patients with nonepileptic abnormalities and 12%(95% confidence interval,3%to 21%)in patients in whom both electroencephalograms were normal.The sensitivity proved to be 48%. Interobserver agreement among four neurologists,who independently read 50 electroencephalograms,was found to be moderate.predictive value for each observer,however,was good.We conclude that electroencephalogram findings may play a role in the decision to initiate or delay treatment after an idiopathic first seizure. |
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electroencephalogram
electroencephalogram,abnormalities of
seizure
seizure,adult onset
seizure,prognosis in adults
seizure,risk factors for
seizure,treatment of
seizure,treatment of,first
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