Kojima, G;
Liljas, A;
Iliffe, S;
Walters, K;
(2017)
Prevalence of Frailty in Mild to Moderate Alzheimer's Disease: A Systematic Review and Meta-analysis.
Current Alzheimer Research
, 14
(12)
pp. 1256-1263.
10.2174/1567205014666170417104236.
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Abstract
BACKGROUND: Frailty is a state of increased vulnerability to poor resolution of homeostasis as a consequence of age-related decreased physiological reserves. Although physical frailty and cognitive impairment have been shown to be associated, evidence on the prevalence of frailty in Alzheimer’s disease is scarce. OBJECTIVE: To conduct a systematic review on the prevalence of frailty and to combine the data to synthesize the pooled prevalence of physical frailty among patients with Alzheimer’s disease. METHOD: Five electronic databases (Embase, MEDLINE, CINAHL Plus, PsycINFO, and the Cochrane Library) were searched for studies providing cross-sectional data on physical frailty among patients with Alzheimer’s disease published from 2000 to January 2016. RESULTS: Of 2,564 studies identified through the systematic review, five studies incorporating 534 patients with Alzheimer’s disease were included for the meta-analysis. The prevalence of frailty varied with a wide range from 11.1% to 50.0% and the pooled prevalence was 31.9% (five studies, 95% confidence interval (CI)=15.7%-48.5%) . The high degree of heterogeneity was observed in all analyses publication bias was detected. CONCLUSION: The current study showed that frailty is highly prevalent in older patients with Alzheimer’s disease in the community with the pooled prevalence of 31.9%. The true prevalence may be much higher given that end-stage patients may not be included. This information is important for clinicians and researchers.
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