## Access

You are not currently logged in.

Access your personal account or get JSTOR access through your library or other institution:

## If You Use a Screen Reader

This content is available through Read Online (Free) program, which relies on page scans. Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.

# 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
Preview not available

## 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]).

• 793
• 794
• 795
• 796
• 797
• 798
• 799
• 800