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  • Title: Subtypes of mild cognitive impairment in patients with Parkinson's disease: evidence from the LANDSCAPE study.
    Author: Kalbe E, Rehberg SP, Heber I, Kronenbuerger M, Schulz JB, Storch A, Linse K, Schneider C, Gräber S, Liepelt-Scarfone I, Berg D, Dams J, Balzer-Geldsetzer M, Hilker R, Oberschmidt C, Witt K, Schmidt N, Mollenhauer B, Trenkwalder C, Spottke A, Roeske S, Wittchen HU, Riedel O, Dodel R.
    Journal: J Neurol Neurosurg Psychiatry; 2016 Oct; 87(10):1099-105. PubMed ID: 27401782.
    Abstract:
    OBJECTIVE: Inconsistent results exist regarding the cognitive profile in patients with Parkinson's disease with mild cognitive impairment (PD-MCI). We aimed at providing data on this topic from a large cohort of patients with PD-MCI. METHODS: Sociodemographic, clinical and neuropsychological baseline data from patients with PD-MCI recruited in the multicentre, prospective, observational DEMPARK/LANDSCAPE study were analysed. RESULTS: 269 patients with PD-MCI (age 67.8±7.4, Unified Parkinson's Disease Rating Scale (UPDRS-III) scores 23.2±11.6) were included. PD-MCI subtypes were 39.4% non-amnestic single domain, 30.5% amnestic multiple domain, 23.4% non-amnestic multiple domain and 6.7% amnestic single domain. Executive functions were most frequently impaired. The most sensitive tests to detect cognitive dysfunctions were the Modified Card Sorting Test, digit span backwards and word list learning direct recall. Multiple stepwise regression analyses showed that global cognition, gender and age, but not education or disease-related parameters predicted PD-MCI subtypes. CONCLUSIONS: This study with the so far largest number of prospectively recruited patients with PD-MCI indicates that non-amnestic PD-MCI is more frequent than amnestic PD-MCI; executive dysfunctions are the most typical cognitive symptom in PD-MCI; and age, gender and global cognition predict the PD-MCI subtype. Longitudinal data are needed to test the hypothesis that patients with PD-MCI with specific cognitive profiles have different risks to develop dementia.
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