Performance of methods for meta-analysis of diagnostic test accuracy with few studies or sparse data

Takwoingi, Yemisi and Guo, Boliang and Riley, Richard D. and Deeks, Jonthan J. (2015) Performance of methods for meta-analysis of diagnostic test accuracy with few studies or sparse data. Statistical Methods in Medical Research . ISSN 1477-0334

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Hierarchical models such as the bivariate and hierarchical summary receiver operating characteristic (HSROC) models are recommended for meta-analysis of test accuracy studies. These models are challenging to fit when there are few studies and/or sparse data (for example zero cells in contingency tables due to studies reporting 100% sensitivity or specificity); the models may not converge, or give unreliable parameter estimates. Using simulation, we investigated the performance of seven hierarchical models incorporating increasing simplifications in scenarios designed to replicate realistic situations for meta-analysis of test accuracy studies. Performance of the models was assessed in terms of estimability (percentage of meta-analyses that successfully converged and percentage where the between study correlation was estimable), bias, mean square error and coverage of the 95% confidence intervals. Our results indicate that simpler hierarchical models are valid in situations with few studies or sparse data. For synthesis of sensitivity and specificity, univariate random effects logistic regression models are appropriate when a bivariate model cannot be fitted. Alternatively, an HSROC model that assumes a symmetric SROC curve (by excluding the shape parameter) can be used if the HSROC model is the chosen meta-analytic approach. In the absence of heterogeneity, fixed effect equivalent of the models can be applied.

Item Type: Article
Keywords: diagnostic accuracy, meta-analysis, hierarchical models, HSROC model, bivariate model, sensitivity, specificity, diagnostic odd ration, sparse data, random effects
Schools/Departments: University of Nottingham UK Campus > Faculty of Medicine and Health Sciences > School of Medicine
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Depositing User: Guo, Dr Boliang
Date Deposited: 03 Feb 2016 13:28
Last Modified: 14 Sep 2016 12:47

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