MAPT and Alzheimer disease: The aim of the present study was to examine tau plasma levels in SCD patients and healthy controls (HC) participating in the DELCODE study and to investigate the association with clinical parameters (age, gender, and education), neuropsychological parameters (Mini-Mental-State Examination [MMSE], Clinical Dementia Rating [CDR], and logical memory subtest of the Wechsler Memory Scale) and biochemical markers of AD (CSF levels of beta-amyloid 42 [Aβ42], tau and phosphorylated tau181 [p-tau181]).