Fig. 4
From: In vivo cardiovascular magnetic resonance of 2D vessel wall diffusion anisotropy in carotid arteries
Linear regression analyses to compare FA, RD and λ1 vessel wall values with volunteer’s age. a Significant linear relationship (p-value = 0.00477) between mean FA and age; black solid line represents the fitted linear model (adjusted R2 = 0.52; linear equation: y = −0.0049x + 0.79). b Linear trend (p-value = 0.095) between mean RD and age; black solid line represents the fitted linear model (adjusted R2 = 0.18; linear equation: y = 1e-5x + 3.4e-4). c No linear relationship (p-value = 0.65) between the mean primary eigenvalues (λ1) and age was found; black solid line represents the fitted linear model (adjusted R2 = −0.08; linear equation: y = 1e-5x + 2e-3). In addition, calculated 95 % confidence (CI, red dashed line) and prediction intervals (PI, green dashed line) are plotted