Abstract:
OBJECTIVE:The International League Against Epilepsy (ILAE) has proposed to expand the definition of remission to 10 years seizure-free with the last 5 years off antiepileptic drugs (AEDs). We examined if a 10-year remission is needed to predict the lowest recurrence risk. METHODS:The population-based study cohort consisted of 148 patients with new-onset childhood epilepsy living in the catchment area of Turku University Hospital. They were prospectively followed for 44 years (median). Patients in first remission were prospectively followed for the duration of remission or possible relapse at 2 years in remission with the last year without antiepileptic drugs (AEDs), at 5 years in remission with the last 2 years without AEDs, and at 10 years with the last 5 years without AEDs. For comparison of the proportions of relapsed patients within each remission category exact Clopper Pearson 95% confidence intervals were used. RESULTS:The magnitude of the relapse rate estimates off AEDs did not significantly improve when remission increased from 2 years (2YR) to 5 years (5YR) and further to 10 years (10YR). However, 10YR was a more sensitive measure of no relapse than 2YR. Among patients with remission on or off AEDs, the ability to predict lower relapse rate increased markedly from 2 to 5 years, and again from 5 to 10 years. The risk of relapse was virtually the same estimated after 2YR off AEDs as after 10YR on or off AEDs, except for patients with generalized epilepsy whose 2YR off AEDs was a weaker predictor than 10YR on or off AEDs. SIGNIFICANCE:Given the modest differences in relapse rates between the 5 years seizure-free with last 2 years off medications definition and the 10 years seizure-free with last 5 years off medications, and the adverse impact of not being considered in remission, we propose that a return to the 5-year definition may be warranted.
journal_name
Epilepsiajournal_title
Epilepsiaauthors
Sillanpää M,Schmidt D,Saarinen MM,Shinnar Sdoi
10.1111/epi.13732subject
Has Abstractpub_date
2017-05-01 00:00:00pages
901-906issue
5eissn
0013-9580issn
1528-1167journal_volume
58pub_type
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