For instance, in the black non-Hispanic autism group, the rs1805327 missense variant in the RAD1 host gene, which is enriched in this group in general, is over-represented in multiplex cases with language regression (F(1, 66) = 8.766, p = 0.004; post hoc: pTukey = 0.010–0.025). Here, RAD1 is linked to autism.