Bayesian Analysis of ROC Curves Using Markov-chain Monte Carlo Methods
- 1 October 1996
- journal article
- other
- Published by SAGE Publications in Medical Decision Making
- Vol. 16 (4) , 404-411
- https://doi.org/10.1177/0272989x9601600411
Abstract
The authors introduce a Bayesian approach to generalized linear regression models for rating data observed in the evaluation of a diagnostic technology. Such models were previously studied using a non-Bayesian approach. In a Bayesian analysis, the difficulties inherent in an ordinal rating scale are circumvented by using data-augmen tation techniques. Posterior distributions for the regression parameters—and thereby for receiver operating charactenstic (ROC) curve parameters and values, for the area under a ROC curve, differences between areas, etc.—may then be computed by Mar kov-chain Monte Carlo methods. Inferences are made in standard Bayesian ways. The methods are exemplified by a study of ultrasonography rating data for the detection of hepatic metastases in patients with colon or breast cancer (previously analyzed) and the results compared. Key words: diagnostic test; ordinal regression; sensitivity; spec ificity. (Med Decis Making 1996;16:404-411)Keywords
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