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Figure 1 CART model illustrating likelihood of a patient having a cardiac event in the 12 months after DSE. The total number of patients, N = 558, is represented by the large pie circle (top). The area of each pie is proportional to the number of patients (N) in each group or subgroup. The shaded area of each pie is equal to the percentage of patients in that group who had a cardiac event in the 12 months after DSE. The actual percentage of patients with an event appears next to the shaded portion of each pie, and is followed in parentheses by the 95% confidence limits for the calculated event percentage. Dob EF = dobutamine ejection fraction in %; HTN = hypertension; Pos SE = positive stress echocardiogram; RWMA = rest wall-motion abnormality.
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