Depression and cognitive change among institutionalized aged.

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Abstract
Interrelations between depression (Geriatric Depression Scale) and cognitive impairment (Blessed test) were examined among 201 nursing home and congregate apartment residents in a 2-year, 3-wave study. In structural equations models that controlled autocorrelations and within-occasion correlated residuals, introducing paths from depression to subsequent cognitive status significantly reduced unexplained variance, whereas paths from cognitive status to subsequent depression did not. Subsidiary analyses indicated that the relation of depression to subsequent cognitive status was strongest among persons with borderline (vs. impaired or intact) cognitive status, but only for the first time interval. Discussion addresses explanations for obtained results and implications for monitoring and treating depression among elderly long-term care residents.

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