- Abbreviations: ADAS-Jcog Alzheimer’s Disease Assessment Scale-cognitive subscale cognitive component-Japanese version, CSF Cerebrospinal fluid, DSM-5 Diagnostic and Statistical Manual of Mental Disorders. 5th ed., EEG Electroencephalography, F Female, MMSE Mini-Mental State Examination, MRI Magnetic Resonance Imaging, PiB-PET Pittsburgh compound B positron emission tomography, RBMT Rivermead Behavioural Memory Test, SPECT Single-Photon Emission Computed Tomography, w.n.l within normal limits, p-tau phosphorylated tau