Abstract
Recent studies have provided much needed data on the probability of seizure remission among adults with chronic intractable epilepsy treated medically. Here we provide an extended follow-up to our earlier study in order to provide a more comprehensive picture of long-term prognosis in this patient population during medical treatment. The prevalence cohort was followed for two outcomes-complete seizure remission for ≥ 12 months and subsequent seizure relapse among those attaining a seizure remission. The study outcomes were estimated using Kaplan-Meier analysis. We found that the probability of attaining a ≥ 12 months of complete seizure freedom to be approximately 3-4% per year through 8 years of follow-up. By year 5 since the start of seizure remission, the cumulative probability of seizure relapse was 81%, although only half of the patients with seizure relapse went on to experience their previous seizure frequency.
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