MAPT and Alzheimer disease: Results: CAA (n = 71, 71.77 ± 8.45 years) exhibited lower levels of Aβ40 (p < 0.001), Aβ42 (p = 0.013), total‐Tau (p = 0.040), and pTau181 (p < 0.001) compared to AD (n = 32, 72.97 ± 4.85 years), with similar Aβ42/40 ratio (p = 0.303).