Cerebrospinal Fluid beta-Amyloid(1-42) Levels in the Differential Diagnosis of Alzheimer's Disease-Systematic Review and Meta-Analysis
- Cerebrospinal Fluid beta-Amyloid(1-42) Levels in the Differential Diagnosis of Alzheimer's Disease-Systematic Review and Meta-Analysis
- MILD COGNITIVE IMPAIRMENT; PHOSPHORYLATED-TAU; CSF BIOMARKERS; A-BETA-42/A-BETA-40 RATIO; ASSOCIATION WORKGROUPS; AMYLOID BETA(1-42); NATIONAL INSTITUTE; DEMENTIA; A-BETA-42; RECOMMENDATIONS
- Issue Date
- PUBLIC LIBRARY SCIENCE
- PLOS ONE, v. 10, NO 2, Page. 1-16
The purpose of this study was to carry out systematic review of the literature and metaanalysis to evaluate the diagnostic utility of cerebrospinal fluid (CSF) levels of the 42 amino acid form of amyloid-beta (A beta(1-42)) as a biomarker for differentiating Alzheimer's disease (AD) from non-AD dementia.
Design. Systematic literature review was used to evaluate the effectiveness of the A beta for the diagnosis of AD. The Scottish Intercollegiate Guidelines Network (SIGN) tool was used to evaluate independently the quality of the studies.
Data sources. The literature review covered from January 1, 2004, to October 22, 2013, and searched eight domestic databases including Korea Med and international databases including Ovid-MEDLINE, EMBASE, and Cochrane Library.
Data Extraction and Synthesis. Primary criteria for inclusion were valid studies on (i) patients with mild cognitive impairment with confirmed or suspected AD and non-AD dementia, and (ii) assessment of A beta(1-42) levels using appropriate comparative tests.
A total of 17 diagnostic evaluation studies were identified in which levels of CSF A beta(1-42) were assessed. Meta-analysis was performed on 11 robust studies that compared confirmed AD (n = 2211) with healthy individuals (n = 1030), 10 studies that compared AD with non-AD dementias (n = 627), and 5 studies that compared amnestic mild cognitive impairment (n = 1133) with non-amnestic type subjects (n = 1276). Overall, the CSF A beta(1-42) levels were reduced in AD compared to controls or non-AD dementia. The effectiveness of test was evaluated for diagnostic accuracy (pooled sensitivity, 0.80 (95% CI 0.78-0.82)
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