DiagTest3Grp: Diagnostic test summary measures for three ordinal groups. The R package provides utilities to estimate and make inference on two summary measures for diagnostic tests when there are three ordinal groups —-volume under ROC surface (VUS) and the extended Youden index, assuming that diagnostic markers increase monotonically and stochastically with disease severity. Point estimates, variance, confidence interval and optimal cut-points both under the normal assumption and also the non-parametric method(s) will be provided for the summary measures. Statistical tests are implemented to compare multiple diagnostic tests and two diagnostic test. Sample size is calculated to estimate the summary measures within a user-specified margin of error for future study planning
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References in zbMATH (referenced in 3 articles , 1 standard article )
Showing results 1 to 3 of 3.
- Sara Perez-Jaume; Konstantina Skaltsa; Natàlia Pallarès; Josep Carrasco: ThresholdROC: Optimum Threshold Estimation Tools for Continuous Diagnostic Tests in R (2017) not zbMATH
- Luo, Jingqin; Xiong, Chengjie: Youden index and associated cut-points for three ordinal diagnostic groups (2013)
- Jingqin Luo; Chengjie Xiong: DiagTest3Grp: An R Package for Analyzing Diagnostic Tests with Three Ordinal Groups (2012) not zbMATH