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Interpretation of dichotomous outcomes: sensitivity, specificity, likelihood ratios, and pre-test and post-test probability

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Open access
Authors
Kent, Peter
Hancock, M.
Date
2016
Type
Journal Article

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Kent, P. and Hancock, M. 2016. Interpretation of dichotomous outcomes: sensitivity, specificity, likelihood ratios, and pre-test and post-test probability. Journal of Physiotherapy. 62 (4): pp. 231-233.
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Journal of Physiotherapy
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School of Physiotherapy and Exercise Science
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This open access article is distributed under the Creative Commons license http://creativecommons.org/licenses/by-nc-nd/4.0/

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Abstract

This is the second Research Note in a two-part series on the interpretation of statistical methods used to analyse dichotomous outcomes. The first paper covered risk, odds, risk ratios, odds ratios, and number needed to treat. This paper focuses on sensitivity, specificity, likelihood ratios, and pre-test and post-test probability. These additional measures are calculated from 2 x 2 contingency tables, as were the risk ratios and odds ratios previously covered.