On tests for equality of predictive values fortdiagnostic procedures
- 12 October 1985
- journal article
- research article
- Published by Wiley in Statistics in Medicine
- Vol. 4 (4) , 535-539
- https://doi.org/10.1002/sim.4780040414
Abstract
This paper concerns comparisons of the efficiency of several diagnostic tests, as characterized by the measures of sensitivity (ξ), specificity (η) and predictive value (ρ). We show that hypotheses concerning the equality of predictive values relate only to hypotheses concerning ξ and η and that we can test these by approximate χ2statistics. Data for the cases of t = 2 or 3 diagnostic tests illustrate the method.Keywords
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