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Appraising Heterogeneity

  • Antonia Zapf
Chapter

Abstract

In general, in the meta-analysis of diagnostic accuracy studies, large heterogeneity between the studies is present, which cannot be explained by chance alone and can lead to inconsistent results. There are several study-specific aspects, which can lead to large variation or even to bias. Therefore, methods are needed to evaluate and to consider this heterogeneity in an appropriate way. For the analysis the most noted are the HSROC approach and the bivariate model. However, in the literature several other approaches can be found, which consider heterogeneity in specific scenarios. In this chapter the different sources of heterogeneity will be described, and methods for illustration and quantification of the heterogeneity will be presented. Furthermore, the available approaches for meta-analysis with covariates will be discussed with the focus on sensitivity (as true positive rate) and specificity (as true negative rate) as co-primary endpoints and the comparison of an index test with the reference standard. Furthermore, some extra topics will be addressed, as, for example, meta-analysis of diagnostic studies with multiple thresholds, individual data meta-analysis, and other endpoints like predictive values. Data from a published meta-analysis will be used for illustration.

Keywords

Heterogeneity Meta-regression HSROC Bivariate model Diagnostic accuracy 

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Copyright information

© Springer International Publishing AG, part of Springer Nature 2018

Authors and Affiliations

  1. 1.Department of Medical StatisticsUniversity Medical Center GöttingenGöttingenGermany
  2. 2.Department of Medical Biometry and EpidemiologyUniversity Medical Center Hamburg-EppendorfHamburgGermany

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