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A structured sample of mobile elderly patients in a rural community practice was assessed on validated rating scales for depression, dementia and disability. A total of 62% of the sample was abnormal on at least one variable. The overall prevalence of depression was 13%; the overall prevalence of dementia was either 10 or 18% depending on the criterion of Mental Test Score (MTS). Depression and dementia were related, depression being more common in females. In depressed and demented patients, MTS was age-related in those over 60 years; in depression alone, MTS was not age-related. Dementia was age-related, particularly over the age of 75. Disability increased with age and was more common in females. Disability was associated with both depression and dementia.
Griffiths et al. (Wed,) studied this question.
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