Figure 1 Pretest score calibration. Cardiac death/myocardial infarction is plotted as a function of the pretest score for all patients (A), exercise patients (B), and pharmacological stress patients (C). Vertical bars represent the event rate (dark horizontal line in bar) with the exact binomial confidence intervals. Each bar is accompanied by two numbers. The top number is the number of events and the bottom number is the total number of patients in the respective stratum. See text for further discussion.