MAPT and Alzheimer disease: The protein biomarker levels for the LOAD group were also consistent with AD (Aβ-42 = 431.3 ± 139.4 pg/ml; total tau = 721.6 ± 245.1 pg/ml; phospho-tau = 97.1 ± 19.7 pg/ml; ATI = 0.37 ± 0.17).