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o Explain to interested patients that in this small non-randomized study, researchers found that apathy may be a core feature of Parkinson's disease, and not necessarily a sign of depression.

GAINSEVILLE, Fla., July 10 -- Apathy independent of depression may be a feature of Parkinson's disease for some patients, researchers here have found.

In a study comparing 80 patients with Parkinson's with 20 others with non-Parkinson's dystonia, half of those with Parkinson's scored positive on a validated test for apathy, compared with only one-fifth of the patients with dystonia, reported Lindsey Kirsch-Darrow, M.S., and colleagues of the University of Florida in Gainesville in the July 11 issue of Neurology.

Apathy could be a core feature of Parkinson's disease independent of depression, the investigators contended.

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