Assessing behavioural and cognitive impairment in dementia using an informant's report: evidence from the CAMDEX interview.

The consistency of measures from informants' report and from objective testing, both incorporated into the CAMDEX interview, was tested for elderly persons with mild dementia (n = 46), with moderate dementia (n = 41), and without cognitive impairment (controls, n = 56). Informants' reports permitted grading severity of dementia and provided measures of memory and mental functioning in everyday activities highly related to indices derived from objective testing.