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BACKGROUND: Depressive symptoms are associated with cognitive decline in elderly people, but the nature of their temporal relationship remains equivocal. AIMS: To test whether depressive symptoms predict cognitive decline in elderly people with normal cognition. METHOD: The Center for Epidemiologic Study depression scale (CES-D) and the Mini-Mental State Examination (MMSE) were used to evaluate depressive symptomatology and cognitive functioning, respectively. A sample of 1003 persons aged 59-71 years and with a MMSE score of 26 or over was selected. Cognitive decline was defined as a drop of at least 3 points on the MMSE at 4-year follow-up. RESULTS: Baseline high levels of depressive symptoms predicted a higher risk of cognitive decline at 4-year follow-up. The MMSE score of participants with depression was more likely to fall below 26 at 2-year follow-up and to remain below at 4-year follow-up than the MMSE score of those without depressive symptoms. Persistent but not episodic depressive episodes were associated with cognitive decline. CONCLUSIONS: High levels of depressive symptoms, when persistent, are associated with cognitive decline in a sample of elderly people.
Paterniti et al. (Thu,) studied this question.
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