Statistics Notes: Diagnostic tests 2: predictive values
نویسندگان
چکیده
منابع مشابه
Understanding diagnostic tests 1: sensitivity, specificity and predictive values.
UNLABELLED The usefulness of diagnostic tests, that is their ability to detect a person with disease or exclude a person without disease, is usually described by terms such as sensitivity, specificity, positive predictive value and negative predictive value. In this article, the first of the series, a simple, practical explanation of these concepts is provided and their use and misuse discussed...
متن کاملEvidence Based Emergency Medicine Part 2: Positive and negative predictive values of diagnostic tests
Introduction: n volume 3, number 2, pages 48-49, we explained some screening characteristics of a diagnostic test in an educational manuscript entitled “Simple definition and calculation of accuracy, sensitivity and specificity" (1). The present article was aimed to review other screening performance characteristics including positive and negative predictive values (PPV and NPV). PPV and NPV ar...
متن کاملsbe36.1 Summary statistics for diagnostic tests
References Gleason, J. R. 1997. ip18: A command for randomly resampling a dataset. Stata Technical Bulletin 37: 17–22. Reprinted in Stata Technical Bulletin Reprints, vol. 7, pp. 77–83. ——. 1999. ip18.1: Update to resample. Stata Technical Bulletin 52: 9–10. Reprinted in Stata Technical Bulletin Reprints, vol. 9, p. 119. Weesie, J. 1997. dm46: Enhancement to the sample command. Stata Technical ...
متن کاملComparing the predictive values of diagnostic tests: sample size and analysis for paired study designs.
BACKGROUND Although statistical methodology is well developed for comparing diagnostic tests in terms of their sensitivities and specificities, comparative inference about predictive values is not. PURPOSE In this paper we consider the design and analysis of studies comparing the positive and negative predictive values of two diagnostic tests that are measured on all subjects. METHODS We fo...
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ژورنال
عنوان ژورنال: BMJ
سال: 1994
ISSN: 0959-8138,1468-5833
DOI: 10.1136/bmj.309.6947.102