At the statistical trend level, we also observed differences in plasma Aβ42/40 levels in AD‐only versus AD and LBD groups (P = 0.058, Appendix Fig S12); in both p‐tau217 and Aβ42/40 levels in AD‐only versus AD and AGD groups (P = 0.052 and P = 0.069, respectively; Appendix Fig S13) and in NfL levels in AD‐only versus AD and CWMR (P = 0.090, Appendix Fig S14). Here, NEFL is linked to Alzheimer disease.