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Figure 5 Examples of predicted event rates in the first and second years after the index single photon emission computed tomography study. The top pair of bars represents first- and second-year event rates in a 50-year-old male with no known coronary artery disease (CAD) undergoing exercise stress. In comparison, an 80-year-old male with no known CAD undergoing adenosine stress would have significantly greater first- and second-year event rates. Of note, although the risk increases, the rates in the first and second years are not different. On the other hand, the counterparts of these two patients with CAD, as shown in the bottom two pairs of bars, would have significantly greater risk, the rate in the second year would exceed that in the first year, and the change in risk between year 1 and year 2 would increase as a function of age in the setting of known CAD. Black bars = year 2 predicted hard event rate. White bars = year 1 predicted hard event rate. Ad = adenosine; Ex = exercise; Hx = history; y.o. = year old.