Demographic Data of the participants.

Data were expressed as the mean ± standard deviation. ADL/IADL, Activity of Daily Living and Instrumental Activities of Daily Living scale; CDR, Clinical Dementia Rating; GDS, Global Deterioration Scale; HIS, Hachinski Ischemic Score; HRSD-17, Hamilton Rating Scale for Depression with17 items; MMSE, Mini Mental State Examination; MoCA, Montreal Cognitive Assessment; N/A, not applicable; NC, normal controls. aThe p value for ANOVA or chi-square test in 3 groups. bThe p value was obtained by two-sample t-test between the AD and BD patients.