(A) CERAD word list delayed recall as a function of Log10 Plasma P-tau217. (B) API cognitive composite score as a function of Log10 Plasma P-tau217. (C) CERAD word list delayed recall as a function of Log10 Plasma NfL. (D) API cognitive composite score as a function of Log10 Plasma NfL. Abbreviations: NfL, Neurofilament light chain; P-tau217, Plasma-measured tau phosphorylated at threonine 217; CERAD, Consortium to Establish a Registry for Alzheimer’s Disease; API, Alzheimer Prevention Initiative. Orange represents female carriers, and green represents male carriers. Circles represent cognitively unimpaired carriers, and triangles represent cognitively impaired carriers.