Fig. 4

Age vs. PeakR and BaseR for all subjects undergoing sonotubometric testing. A scatter plot of age versus PeakR and BaseR for all study subjects. Age (years) is represented by the x-axis and power transmission ratio is represented by the y-axis. A moderately positive correlation was observed for both BaseR and PeakR, and age (p = 0.003, p < 0.001, respectively). These findings are highlighted in Table 6