Table 2.

Regression model for age

Metric	Predictor	df, df_error	SS	F	p
FA	Between subjects
	Age	1, 171	0.347	77.867	<0.001***
	Within subjects
	Subregion	4, 684	1.395	476.799	<0.001***
	Subregion x age	4, 684	0.046	15.577	<0.001***
RD	Between subjects
	Age	1, 171	1.123	105.901	<0.001***
	Within subjects
	Subregion	4, 684	2.217	395.324	<0.001***
	Subregion x age	4, 684	0.129	22.963	<0.001***
AD	Between subjects
	Age	1, 171	0.215	10.239	0.002**
	Within subjects
	Subregion	4, 684	1.970	159.027	<0.001***
	Subregion x age	4, 684	0.072	5.818	<0.001***

df, degrees of freedom; SS, sum of squares; FA, fractional anisotropy; RD, radial diffusivity; AD, axial diffusivity.
*p < 0.05, **p < 0.01, ***p < 0.001.