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Participant and Study Partner Reported Impact of Cognition on Functional Activities in Parkinson's Disease
Author(s) -
Cholerton Brenna,
Poston Kathleen L.,
Tian Lu,
Quinn Joseph F.,
Chung Kathryn A.,
Hiller Amie L.,
Hu ShuChing,
Specketer Krista,
Montine Thomas J.,
Edwards Karen L.,
Zabetian Cyrus P.
Publication year - 2020
Publication title -
movement disorders clinical practice
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.754
H-Index - 18
ISSN - 2330-1619
DOI - 10.1002/mdc3.12870
Subject(s) - activities of daily living , cognition , psychology , dementia , recall , clinical dementia rating , clinical psychology , psychological intervention , cognitive skill , disease , developmental psychology , cognitive impairment , psychiatry , medicine , cognitive psychology , pathology
Cognitive dysfunction is common in Parkinson's disease (PD) and associated with reduced functional abilities and increased dependence. To date, however, little is known about the relationship between performance of instrumental activities of daily living (IADLs) and cognitive stages in PD, and there are conflicting reports as to whether declines in specific cognitive domains predict IADL impairment. Methods Participants with PD were drawn from the Pacific Udall Center and included in the study if both participant and study partner IADL ratings and cognitive tests were completed (n = 192). Logistic regression analyses were performed to determine whether participant and/or study partner rating predicted mild cognitive impairment or dementia. Correlations are reported for the relationship between participant/study partner IADL reports as well as for specific cognitive tests. Results Although both participant and study partner ratings of IADL performance were associated with a diagnosis of PD with dementia, only participant self‐rating of functional ability was significantly associated with a diagnosis of PD with mild cognitive impairment. Functional ability correlated most strongly with measures of processing speed, auditory working memory, and immediate verbal recall for both the participant and study partner ratings. Conclusion For participants with PD in the early stages of cognitive decline, self‐rating may be more sensitive to the impact of cognitive changes on IADL function than ratings made by a knowledgeable study partner. Changes in executive function, processing speed, and learning may indicate a higher likelihood of IADL impairment. Careful assessment of cognition and IADL performance is recommended to permit individualized interventions prior to significant disability.