Prospective study of the emergence of syndromal and sub syndromal anxiety and depression during cognitive decline.

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In older people it is well known that memory impairment and cognitive decline are associated with depression and anxiety. However, it is remains quite uncertain which comes first. For a long time it had been thought that deteriorating brain function associated with ageing and the development of dementia is also the cause of new symptoms of depression and anxiety found in older people. Recently, some evidence has emerged to challenge this hypothesis. So we plan to study this question in detail with data from an existing longitudinal study of ageing women.