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Figure 2 Regression curves representing the effect of age on parameters of arterial stiffness and wave reflection for males (circles, solid lines) and females (squares, dashed lines). Panel A represents augmentation pressure (open circles/open squares) and augmentation index (closed circles/closed squares). Panel B represents aortic pulse wave velocity. Data points are the group means for each decile of age. The estimated functions for these relationships appear in Table 2.