ADAS-cog, cognitive subscale of the Alzheimer’s Disease Assessment Scale Japanese version; CDR, clock drawing test; FAB, frontal assessment battery; JART, Japanese Reading Test; MMSE, Mini-Mental State Examination; ROCFT, Rey-Osterreith Complex Figure Test; WAIS-Ⅲ, Wechsler Adult Intelligence Scale-Third Edition; WMS-R, Wechsler Memory Scale-Revised.