For “Status epilepticus” (HP:0002133) with SCN1A and “Infantile spasms” (HP:0012469) with STXBP1, the phenotypic features show a high frequency in the gene-positive group for SCN1A at 1.0 years and STXBP1 at 0.5 years. This evidence concerns the gene SCN1A and infantile spasms.