• Normal, depressed, and demented elderly persons who were identified by means of a community survey were asked to assess their memories and to complete a battery of memory tests. Depressed elderly persons reported memory problems more often than normal subjects and reported indecisiveness, impaired concentration, and mental slowing more often than demented subjects. However, memory complaints and memory performance correlated poorly in the normal and depressed groups. Normal and demented elderly persons who reported memory problems achieved higher scores on a series of questions about depression than those who denied memory problems.
O'Connor DW, Pollitt PA, Roth M, Brook CPB, Reiss BB. Memory Complaints and Impairment in Normal, Depressed, and Demented Elderly Persons Identified in a Community Survey. Arch Gen Psychiatry. 1990;47(3):224-227. doi:10.1001/archpsyc.1990.01810150024005