Analysis populations
The Enrolled Set is defined as all patients enrolled in the study. The Safety Set and Full Analysis Set (FAS) are both defined as all randomized patients treated with at least one dose of study drug. The Per‐Protocol Set is defined as all patients in the FAS without major protocol deviations. The EEG Analysis Subset is defined as all patients in the FAS with a baseline and post‐baseline (+78 weeks) EEG recording available. All efficacy analyses will be based on the FAS and Per‐Protocol Set, and all safety analyses will be based on the Safety Set. Demographic and baseline characteristics will be presented for the FAS, Per‐Protocol Set, and Safety Set. All listings will be presented for the Enrolled Set.