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Figure 3 Kaplan-Meier survival curves according to dichotomized of baroreflex sensitivity by the transfer function method (TF-BRS) (n = 228). Estimated survival probabilities (95% confidence interval) at 12, 24, and 36 months are: 0.97 (0.94 to 1.00), 0.92 (0.87 to 0.97), 0.87 (0.80 to 0.93), respectively, for TF-BRS >3.1 ms/mm Hg; and 0.88 (0.82 to 0.95), 0.73 (0.63 to 0.82), 0.65 (0.55 to 0.76), respectively, for TF-BRS 3.1 ms/mm Hg.