GEORGE A. DIAMOND, M.D.; JAMES S. FORRESTER, M.D.
To the editor: Ellison and Seney (1) (along with five others who corresponded with us directly) correctly detected an error in our article on clinical trials (2) in panel A of Figure 1. The posterior probability curves, although properly calculated by a computer, were improperly labeled by a mortal—a pernicious demonstration of Murphy's law. The labels should be identical to those in panel B. We apologize for the error. Our conclusion—that a statistically significant result may not support the truth of a tested hypothesis when sample size is small—is still supported, however, by reference to panel B. The statement by
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DIAMOND GA, FORRESTER JS. Posterior Probability in Clinical Trials. Ann Intern Med. 1984;100:457. doi: 10.7326/0003-4819-100-3-457_2
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Published: Ann Intern Med. 1984;100(3):457.
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