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Figure 6 Kaplan-Meier two-year survival as a function of prognostic score in the population examined during the time period that walking adenosine stress was performed (p < 0.0001 [log-rank] across scores). Bars represent 95% confidence intervals. These bars are centered at the mean prognostic score values of seven subgroups (mean value and number of patients): 1) 30.5, n = 445; 2) 39.8, n = 620; 3) 45.6, n = 551; 4) 50.5, n = 556; 5) 57.2, n = 792; 6) 65.6, n = 218; and 7) 73.5, n = 112.