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Is quality of life in non‐demented Parkinson’s disease patients related to cognitive performance? A clinic‐based cross‐sectional study
Author(s) -
Klepac N.,
Trkulja V.,
Relja M.,
Babić T.
Publication year - 2008
Publication title -
european journal of neurology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.881
H-Index - 124
eISSN - 1468-1331
pISSN - 1351-5101
DOI - 10.1111/j.1468-1331.2007.02011.x
Subject(s) - medicine , quality of life (healthcare) , dementia , beck depression inventory , depression (economics) , effects of sleep deprivation on cognitive performance , cognition , neuropsychology , parkinson's disease , univariate analysis , psychiatry , clinical psychology , disease , multivariate analysis , anxiety , nursing , economics , macroeconomics
Whilst the association between dementia and poorer health‐related quality of life (Hr‐QoL) in Parkinson’s disease (PD) has been well established, we aimed to explore the relationship between cognitive performance and Hr‐QoL in PD without dementia. Consecutive PD patients ( n = 124, 54% men, age 60.4 ± 10.3 years) judged as non‐demented based on DSM‐IV criteria and Mini Mental State Examination, free of other neurodegenerative diseases or psychotic difficulties and antipsychotic/antidepressive/anxyolitic treatment were assessed in a battery of neuropsychological tests. We used Parkinson’s disease questionnaire (PDQ‐39) to asses Hr‐QoL and Beck’s Depression Inventory (BDI) to quantify depression. In the univariate analysis, better performance in each of the tests evaluating visual attention/memory or visuospatial and executive functions was associated with better Hr‐QoL. In multivariate analysis [adjustment for BDI score, PD severity and duration, l ‐dopa dose, age, sex, education, employment status and early PD onset (<50 years of age)] in which these tests were either represented by a common variable identified in a principal components analysis or were considered individually, better cognitive performance was independently associated with better Hr‐QoL. The association was conditional on the level of depression, i.e., apparent only in patients with low(er) BDI scores. Cognitive performance appears associated with Hr‐QoL even in non‐demented PD patients.