A copy editing error changed the meaning of a letter (1) in the October issue. The fourth sentence in the third paragraph should read: "Only 4 of 19 candidate variables were so identified (malaise, ascites, serum bilirubin, the physician's estimate of outcome), and a prediction model based on them correctly classified 84% of the patients."
Correction: Treadmill Score for Predicting Prognosis in Coronary Artery Disease. Ann Intern Med. ;108:161. doi: 10.7326/0003-4819-108-1-161_1
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Published: Ann Intern Med. 1988;108(1):161.
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