Likewise, within-domain IIV did not vary as a function of APOE status in MCI [F(1,27) = 0.348; p = 0.560; ηp2 = 0.013] or AD [F(1,21) = 0.149; p = 0.703; ηp2 = 0.007]. The gene discussed is APOE; the disease is Alzheimer disease.