ANGPT2 and Alzheimer disease: The exceptions were serum ANGPT2, which correlated positively with Aβ1‐40 in the combined cohort (r = 0.29, p = 0.013) and positively but weakly with Aβ1‐40 (r = 0.40, p = 0.046) and Aβ1‐42 (r = 0.41, p = 0.042) in the AD subgroup.