plot of sensitivity against 1−specificity (or false positive rate). Figure 2 shows an ROC plot of test accuracy of a single test at different thresholds. ROC plots are also used within studies to compare different tests, to compare different groups of patients, and to investigate variability between different test observers (readers). ROC plots are useful in systematic reviews to present result...

Diagnostic systems of several kinds are used to distinguish between two classes of events, essentially "signals" and "noise". For them, analysis in terms of the "relative operating characteristic" of signal detection theory provides a precise and valid measure of diagnostic accuracy. It is the only measure available that is uninfluenced by decision biases and prior probabilities, and it places ...

The R-package mada is a tool for the meta-analysis of diagnostic accuracy. In contrast to univariate meta-analysis, diagnostic meta-analysis requires bivariate models. An additional challenge is to provide a summary receiver operating characteristic curves that seek to integrate receiver operator characteristic curves of primary studies. The package implements the approach of Reitsma, Glas, Rut...

introduction: designing a tool that can differentiate those at risk of child abuse with great diagnostic accuracy is of great interest. the present study was designed to evaluate the diagnostic accuracy of escape instrument in triage of at risk cases of child abuse presenting to emergency department (ed). methods: the present diagnostic accuracy study performed on 6120 of the children under 16 ...