Cognitive deficits are often associated with Parkinson’s disease (PD), although their prevalence in PD patients without dementia is still unknown. In order to describe the neuropsychological profile of PD patients without dementia, a sample of 103 PD patients was compared with a control group consisting of 38 healthy elderly subjects. Psychometric assessment consisted of the Mini Mental State Examination, the Dementia Rating Scale and a battery of neuropsychological tests. The Beck Depression Inventory was used to assess depression in PD patients. Dementia was diagnosed in 27 patients. Among non-demented subjects, 34 (45%) had no cognitive impairment and 42 (55%) had a mild cognitive impairment. Subjects with mild cognitive impairment were older, had a later onset of the disease, and more severe motor symptoms than cognitively intact subjects. Identification of mild cognitive impairment is important, since these symptoms are important for patient management and may also facilitate to determine prognosis.

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