Figure 2

Bland-Altman plots of agreement in VFA between CT and LBIA. The horizontal solid line represents the mean difference bias between the two measuring methods. The upper and lower dotted lines represent bias ± 2 SD. The linear line is the regression line (y = −0.301 x + 29.521, r = 0.486, p < 0.001, bias = 12.002 cm2, bias – 2 SD = −43.950 cm2, bias + 2 SD = 67.951 cm2).