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Meta-Analysis
. 2019 Mar;27(3):290-300.
doi: 10.1016/j.jagp.2018.10.008. Epub 2018 Oct 19.

Aggressive Behaviors in Alzheimer Disease and Mild Cognitive Impairment: Systematic Review and Meta-Analysis

Rongqin Yu  1 , Anya Topiwala  1 , Robin Jacoby  1 , Seena Fazel  2
Affiliations
Meta-Analysis

Aggressive Behaviors in Alzheimer Disease and Mild Cognitive Impairment: Systematic Review and Meta-Analysis

Rongqin Yu et al. Am J Geriatr Psychiatry. 2019 Mar.

Abstract

Objective: We aim to estimate the risk of perpetrating aggression in Alzheimer disease (AD) and mild cognitive impairment (MCI) by conducting a systematic review and meta-analysis of primary studies.

Methods: A systematic search was conducted in six bibliographic databases according to a preregistered protocol. Studies that reported aggressive behaviors in individuals with AD and MCI compared with healthy individuals or those with other dementia etiologies were identified. Risks of aggressive behaviors were assessed using random effects models to calculate pooled odds ratios (ORs). Publication bias was examined.

Results: In total, 17 studies involving 6,399 individuals with AD and 2,582 with MCI were identified. Compared with healthy individuals, significantly increased risks of aggressive behaviors were found in AD (OR, 4.9, 95% CI, 1.8-13.2) but not in MCI (OR, 1.8, 95% CI, 0.7-4.3). When comparing AD with MCI, the risk in AD was higher (OR, 2.6, 95% CI, 1.7-4.0). We found no differences in risk of aggressive behaviors between AD and other dementia subtypes or between amnestic and nonamnestic MCI.

Conclusion: Individuals with AD are at higher risk of manifesting aggressive behaviors than healthy individuals or those with MCI. Our findings not only underscore the necessity of treatment of aggressive behaviors in AD but also highlight the importance of preventing the transition from MCI to AD.

Keywords: Alzheimer disease; aggressive behaviors; mild cognitive impairment; systematic review.

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Figures

FIGURE 1.
FIGURE 1
Flow chart of the systematic search strategy.
FIGURE 2.
FIGURE 2
Risk of aggressive outcomes in Alzheimer disease (a) and mild cognitive impairment (b) compared with healthy individuals. ID: identification.
FIGURE 3.
FIGURE 3
Risk of aggressive outcomes in Alzheimer disease compared with mild cognitive impairment. ID: identification.
FIGURE 4.
FIGURE 4
Comparisons of risk of aggressive outcomes among dementia subtypes and mild cognitive impairment subtypes. ID: identification.
See this image and copyright information in PMC

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