Use of the accuracy statistic in diagnostic test studies - Analyse-it® blog
Summary
In our last post, we commented that the accuracy statistic, also known as the probability of a correct result, was a useless measure for diagnostic tests. In the second scenario, we again simulated test results on 400 subjects but only 50 with and 350 without the condition. The prevalence of the condition in the sample may be due to the availability of subjects or fixed during the design of the study. Finally, the accuracy statistic is not a good way of comparing diagnostic tests. The measures of the accuracy of a diagnostic test are sensitivity and specificity.
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