Martyr, Anthony; Clare, Linda; Nelis, Sharon M.; Marková, Ivana S.; Roth, Ilona; Woods, Robert T.; Whitaker, Christopher J. and Morris, Robin G.
Verbal fluency and awareness of functional deficits in people with early-stage dementia.
The Clinical Neuropsychologist, 26(3) pp. 501–519.
This is the latest version of this eprint.
Assessment of activities of daily living is an important element in the diagnosis of dementia, with research suggesting a link between functional ability and cognition. We investigated the relationship between self- and carer proxy-ratings of instrumental activities of daily living (iADL) and executive functioning in early-stage dementia. Ninety-six people with early-stage Alzheimer’s disease, vascular or mixed dementia and their carers completed the Functional Activities Questionnaire; people with dementia also completed a test of letter fluency. Letter fluency was associated with self-ratings of iADL, while carer proxy-ratings of iADL correlated with the age and Mini-Mental State Examination score of the person with dementia. Self-ratings of functioning were significantly lower than carer proxy-ratings. Further analysis found those with impaired letter fluency rated themselves as having greater difficulties in iADLs than the remaining letter fluency groups. People with early-stage dementia vary in the extent to which they are aware of iADL functioning, and difficulties with language production may contribute to better awareness of iADL impairments
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