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Presentation of Diagnostic Test Accuracy
- Milo A. Puhan, MD;
- Johann Steurer, MD, MME; and
- Gerben ter Riet, MD, PhD
- From Horten Centre, University Hospital of Zurich, 8091 Zurich, Switzerland.
IN RESPONSE:
Mr. Broce and Dr. Reyes state that it remains unclear how the surveyed physicians derived post-test probabilities. They wondered whether we provided the relevant equations and whether we recorded if participants calculated or guessed post-test probabilities. In fact, we did neither. Therefore, we could not determine how the physicians arrived at their post-test probabilities. However, our experience and research have shown us that most physicians do not formally calculate post-test probabilities; instead, they use quantitative information about a test's informativeness in an inexact way (1, 2). Along …
