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On Comparisons of Sensitivity, Specificity and Predictive Value of a Number of Diagnostic Procedures

B. M. Bennett
Biometrics
Vol. 28, No. 3 (Sep., 1972), pp. 793-800
DOI: 10.2307/2528763
Stable URL: http://www.jstor.org/stable/2528763
Page Count: 8
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On Comparisons of Sensitivity, Specificity and Predictive Value of a Number of Diagnostic Procedures
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Abstract

Specificity ($\xi$), sensitivity ($\eta$) and predictive value ($\rho$) have been proposed as measures of the effectiveness of each of say t diagnostic procedures in the detection of a disease D (e.g., Thorner and Remein [1961]; Vecchio, [1966]). It is assumed that a definitive result can be obtained on the presence or absence of D in each of a series of n patients together with their diagnoses by the t procedures. In this paper $\chi^2$ tests are developed for homogeneity of $\xi$, $\eta$, and $\rho$. These utilize matched sample $\chi^2$ results of the author (Bennett [1967; 1968]).

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