FIGURE 6.

Bland‐Altman plots for subgroups with measurements in nonstenotic versus stenotic segments. The mean of the amplitudes (x‐axis) and the differences of the axial minus sagittal amplitude values (y‐axis) are plotted in each cervical segment for measurements in nonstenotic segments (red color) and in stenotic segments (blue color). The solid horizontal lines represent the mean of all measurement values, while the pointed lines represent the limits of agreement (1.96 × standard deviation). The black solid horizontal line illustrates the 0 value reference for amplitude differences. N, number of measurements.