Med Decis Making - Contrasting two frameworks for ROC analysis of ordinal ratings.

Tópicos

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Resumo

CKGROUND: Statistical evaluation of medical imaging tests used for diagnostic and prognostic purposes often employs receiver operating characteristic (ROC) curves. Two methods for ROC analysis are popular. The ordinal regression method is the standard approach used when evaluating tests with ordinal values. The direct ROC modeling method is a more recently developed approach, motivated by applications to tests with continuous values.OBJECTIVE: The authors compare the methods in terms of model formulations, interpretations of estimated parameters, the ranges of scientific questions that can be addressed with them, their computational algorithms, and the efficiencies with which they use data.RESULTS: The authors show that a strong relationship exists between the methods by demonstrating that they fit the same models when only a single test is evaluated. The ordinal regression models are typically alternative parameterizations of the direct ROC models and vice versa. The direct method has two major advantages over the ordinal regression method: 1) estimated parameters relate directly to ROC curves, facilitating interpretations of covariate effects on ROC performance, and 2) comparisons between tests can be done directly in this framework. Comparisons can be made while accommodating covariate effects and even between tests that have values on different scales, such as between a continuous biomarker test and an ordinal valued imaging test. The ordinal regression method provides slightly more precise parameter estimates from data in our simulated data models.CONCLUSION: Although the ordinal regression method is slightly more efficient, the direct ROC modeling method has important advantages in regard to interpretation, and it offers a framework to address a broader range of scientific questions, including the facility to compare tests.

Resumo Limpo

ckground statist evalu medic imag test use diagnost prognost purpos often employ receiv oper characterist roc curv two method roc analysi popular ordin regress method standard approach use evalu test ordin valu direct roc model method recent develop approach motiv applic test continu valuesobject author compar method term model formul interpret estim paramet rang scientif question can address comput algorithm effici use dataresult author show strong relationship exist method demonstr fit model singl test evalu ordin regress model typic altern parameter direct roc model vice versa direct method two major advantag ordin regress method estim paramet relat direct roc curv facilit interpret covari effect roc perform comparison test can done direct framework comparison can made accommod covari effect even test valu differ scale continu biomark test ordin valu imag test ordin regress method provid slight precis paramet estim data simul data modelsconclus although ordin regress method slight effici direct roc model method import advantag regard interpret offer framework address broader rang scientif question includ facil compar test

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