nominally significantp = .045
The exploratory SCN1A + subgroup analysis (79% of study participants) showed a nominally significant reduction from baseline in convulsive seizure frequency ( p = .045) with soticlestat versus placebo.
The exploratory SCN1A + subgroup analysis (79% of study participants) showed a nominally significant reduction from baseline in convulsive seizure frequency ( p = .045) with soticlestat versus placebo.
Effect on convulsive seizure frequency Soticlestat reduced convulsive seizure frequency compared with placebo in participants with DS, but this difference did not reach statistical significance.
Narrowly missed significance on the primary endpoints is unlikely to be due to a high placebo response, as the placebo rate was in line with clinical trials of other approved drugs for the treatment of DS. 28 , 29 , 30 , 31 However, as mentioned above, the observed placebo response in this trial was higher than in the phase 2 study.
Potential contributors to this narrowly missed statistical significance on the primary outcome are a higher placebo response than in the phase 2 study and a generally more refractory patient population (median [range] number of prior or baseline ASMs was 8 [3–27]).