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Published in: International Orthopaedics 12/2017

01-12-2017 | Review Article

Diagnostic accuracy of alpha-defensin in periprosthetic joint infection: a systematic review and meta-analysis

Authors: Jun Yuan, Yufei Yan, Jiong Zhang, Bibo Wang, Jianmin Feng

Published in: International Orthopaedics | Issue 12/2017

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Abstract

Background

Alpha-defensin, a novel biomarker, has shown great potential for the accurate diagnosis of periprosthetic joint infection (PJI) in recent years: many published studies have presented encouraging results. Nevertheless, the diagnostic accuracy of alpha-defensin is inconsistent across published studies. Moreover, the optimum value of the diagnostic threshold urgently needs to be ascertained. This meta-analysis sought to estimate the precision of alpha-defensin for the diagnosis of PJI and, where possible, to confirm the threshold.

Method

We systematically searched PubMed, Embase, Cochrane, Web of Knowledge, and ClinicalTrials.​gov for relevant literature on alpha-defensin in the diagnosis of PJI (searching publications from the inception of each database until February 2017, with no language restriction). Pooled sensitivity, specificity, diagnostic odds ratios, and likelihood ratios were the indexes used for assessment, with the use of a random-effects model.

Result

Eleven of the 426 studies that evaluated the diagnostic accuracy of alpha-defensin in periprosthetic joint infection (PJI) were included in this analysis. The pooled diagnostic sensitivity of alpha-defensin for PJI was 0.96 (95% confidence interval [CI], 0.87 to 0.99) and the specificity was 0.95 (95% CI, 0.91 to 0.97). Since there was substantial heterogeneity among studies, based on the inconsistency index (I2), threshold, site of arthroplasty, study design and techniques for the alpha-defensin test, subgroup analyses were performed to estimate the impacts of these variables on heterogeneity.

Conclusion

In summary, this meta-analysis clearly lends support to the conclusion that alpha-defensin is a promising addition to the current methods for diagnosis of PJI.
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Metadata
Title
Diagnostic accuracy of alpha-defensin in periprosthetic joint infection: a systematic review and meta-analysis
Authors
Jun Yuan
Yufei Yan
Jiong Zhang
Bibo Wang
Jianmin Feng
Publication date
01-12-2017
Publisher
Springer Berlin Heidelberg
Published in
International Orthopaedics / Issue 12/2017
Print ISSN: 0341-2695
Electronic ISSN: 1432-5195
DOI
https://doi.org/10.1007/s00264-017-3647-3

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