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Figure 8 The observed frequency of patients with ischemic events in each quartile of reaction time (R) values is shown in the figure. The p values indicate that the proportions of ischemic events in first and the second quartiles are not significantly different (p = 0.41) whereas the proportions of ischemic events in the first quartile is significantly different from the third (p = 0.006) and the fourth quartiles (p = 0.004). TEG = thrombelastograph.