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. 2013 Jul;34(7):1443–1449. doi: 10.3174/ajnr.A3350

Table 1:

Age-dependent changes in FA and MD in cerebral WM of the developing brain with an exponential regression model

Region Regression Coefficients
Exponential Fit Model
a b c y-intercept r2 RMSE
FA
    gCC −0.307 0.138 0.722 0.416 0.629 0.039
    bCC −0.327 0.109 0.740 0.414 0.562 0.046
    sCC −0.365 0.117 0.785 0.420 0.729 0.039
    ALIC −0.286 0.125 0.565 0.279 0.745 0.029
    PLIC −0.206 0.073 0.655 0.449 0.772 0.023
MD
    gCC 0.616 0.088 0.902 1.518 0.659 0.088
    bCC 0.617 0.096 0.818 1.435 0.686 0.070
    sCC 0.857 0.069 0.831 1.688 0.671 0.129
    ALIC 0.429 0.134 0.771 1.200 0.683 0.049
    PLIC 0.319 0.089 0.732 1.051 0.692 0.042

Note:—Given are the values for the regression coefficients describing the best-fit function of the FA and MD values for each region of interest.

bCC indicates body of the corpus callosum; gCC, genu of the CC; r2, square of the correlation coefficient, describing the goodness of fit; RMSE, root mean square error; sCC, splenium of the CC.