GEORGE A. DIAMOND, M.D.
To the editors: Mark and coworkers (1) recently proposed a multivariate statistical model based on only three variables that purports to simplify the complex process of prognostic assessment in patients undergoing electrocardiographic stress testing for suspected coronary artery disease. Three points need to be made regarding this model.
First, the model's accuracy was not adequately defined. The population on which the model was based is likely to be highly biased because it is limited to patients referred for coronary angiography—a judgment that relies at least in part on the results of the electrocardiographic test itself (2, 3). The split-sample analysis
DIAMOND GA. Treadmill Score for Predicting Prognosis in Coronary Artery Disease. Ann Intern Med. ;107:595–596. doi: 10.7326/0003-4819-107-4-595
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Published: Ann Intern Med. 1987;107(4):595-596.
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