Figure 3
From: Sex and race differences in J-Tend, J-Tpeak, and Tpeak-Tend intervals
Graphical display of the gradual reduction of the intra-subject standard deviations of JTpc intervals (vertical axes) and of the changes of their intra-subject mean values (horizontal axes) by different rate corrections: Framingham formula using the average of last 3 RR interval preceding the interval measurement (panel A), Framingham formula using the 10-second average of RR intervals (panel B), subject-specific linear formula using the average of last 3 RR interval preceding the interval measurement (panel C), subject-specific linear formula using the 10-second average of RR intervals (panel D), subject-specific linear formula using universal rate hysteresis correction (panel E), and curvilinear subject-specific formula using subject-specific hysteresis correction (panel F). In each panel, the dark red circles, light red circles, amber circles, dark blue squares, light blue squares, and amber squares correspond to the measurements in African females, Caucasian females, other race females, African males, Caucasian males, and other race males, respectively.
