Medical Tests: Part II
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چکیده
In this chapter we continue the discussion of diagnostic testing by considering instruments that are based on continuous outcomes. We also introduce additional diagnostic information in the form of covariates and additional tests. Our primary goal is to generalize the notion of PVP and PVN to a predictive probability of infection/disease conditional on all available diagnostic information. In addition, we generalize the concepts of sensitivity and specificity to the receiver operating characteristic (ROC) curve, which gives information about all possible sensitivity-specificity pairs over the range of all possible cutoffs for a continuous test for disease. The material presented here are mainly taken from work that is discussed in Choi, Johnson, and Thurmond (2006), Choi et al. (2006), and Mcinturff et. al (2004). This work and WinBUGS code are also catalogued at the website www.epi.ucdavis/diagnostictests/.
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