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Translational Neurodegeneration
Published in: Translational Neurodegeneration 1/2016

Open Access 01-12-2016 | Review

Meta-analysis of risk factors for Parkinson’s disease dementia

Authors: Yaqian Xu, Jing Yang, Huifang Shang

Published in: Translational Neurodegeneration | Issue 1/2016

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Abstract

Background

Parkinson’s disease (PD) is a common heterogeneous neurodegenerative disorder in elder population. Parkinson’s disease dementia (PDD) is one of the most common non-motor manifestations in PD patients. No comprehensive review has been conducted to assess risk factors for PDD.

Methods

A systemic search for studies on PDD risk factors was performed. Cohort and case–control studies that clearly defined PDD and presented relevant data were included. The data were analyzed to generate a pooled effect size and 95 % confidence interval (CI). Publication bias was assessed using the Egger’s test and the Begg’s test.

Results

A systematic search was conducted and yielded 5195 articles. After screening, 25 studies were included in the current analysis. Development of PDD was positively associated with age (odds ratio [OR] 1.07, 95 % CI 1.03-1.13), male (OR 1.33, 95 % CI 1.08-1.64), higher Unified Parkinson’s Disease Rating Scale (UPDRS) part III scores (relative risk [RR] 1.04, 95 % CI 1.01-1.07), hallucination (OR 2.47, 95 % CI 1.36-4.47), REM sleep behavior disorder (RBD) (OR 8.38, 95 % CI 3.87-18.08), smoking (ever vs. never) (RR 1.93, 95 % CI 1.15-3.26) and hypertension (OR 1.57, 95 % CI 1.11-2.22). An inverse association was found between education (RR 0.94, 95 % CI 0.91-0.98) and PDD. Other reported factors, including age of onset, disease duration of PD, Hoehn and Yahr stage and diabetes mellitus were not significantly associated with PDD.

Conclusions

Advanced age, male, higher UPDRS III scores, hallucination, RBD, smoking and hypertension increase the risk of PDD, whereas higher education is a protective factor for PDD.
Appendix
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Metadata
Title
Meta-analysis of risk factors for Parkinson’s disease dementia
Authors
Yaqian Xu
Jing Yang
Huifang Shang
Publication date
01-12-2016
Publisher
BioMed Central
Published in
Translational Neurodegeneration / Issue 1/2016
Electronic ISSN: 2047-9158
DOI
https://doi.org/10.1186/s40035-016-0058-0

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