Reagerende patienter blev defineret som dem, der havde mere end 50% reduktion i hyppigheden af kloniske (eller tonisk- kloniske) krampeanfald i den anden måned af den dobbeltblinde periode sammenlignet med baseline.
Responders were defined as having more than 50% reduction in the frequency of clonic (or tonic- clonic) seizures during the second month of the double-blind period compared with baseline.