Age and Ageing, Vol 28, 39-43, Copyright © 1999 by British Geriatrics Society
P Hobson and J Meara
AIM: To assess cognitive function in elderly subjects with clinically
probable Parkinson's disease (PD). METHODS: A community sample of 126
patients with probable PD completed the CAMCOG, which is the cognitive
section of the Cambridge Examination for Mental Disorders, and the Mini-
Mental State Examination (MMSE). The performance of the CAMCOG and the MMSE
in detecting dementia in this subject group was compared with the results
of applying the DSM-IV criteria for dementia to this population. RESULTS: A
total of 44% of the group met DSM-IV criteria for dementia, which is higher
than most previous prevalence figures for dementia in PD. The CAMCOG was
more sensitive than the MMSE in detecting cognitive impairment and more
specific than the MMSE in detecting dementia as defined by DSM-IV criteria.
Poorer performance on the CAMCOG was related to gender, social class and
age (P<0.05). Among subjects with PD, those with dementia, as defined by
DSM-IV criteria, were significantly older, had greater depressive
symptomatology and had greater motor deficits. A greater proportion of the
group with dementia were living in residential care (P<0.05).
CONCLUSION: The CAMCOG appears to be a useful screening instrument for
dementia and cognitive impairment in PD. Furthermore, it may prove helpful
in detecting those with PD who may be at risk of developing dementia and in
longitudinal studies of cognitive function in PD.
ARTICLES
The detection of dementia and cognitive impairment in a community population of elderly people with Parkinson's disease by use of the CAMCOG neuropsychological test
University Department of Geriatric Medicine (North Wales), Glan Clwyd District General Hospital, Rhyl, Denbighshire, UK.
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