question: Compared to Control what was the result of Extended-release oxcarbazepine 1200 mg on Seizure median percent improvement in North America?
context: Median percent reduction was -28.7% for placebo, −38.2% (P = 0.08 vs placebo) for once-daily SPN-804 1200 mg, and −42.9% (P = 0.003) for SPN-804 2400 mg