Table III.

Linear regression analyses for the MR data, controlling for gender

MRI supraregion	β log(age)	t (β)	Sig (t)	R2 change log(age)	R2 model	F (model)	Sig (model)
Gray matter raw
Frontal lobe	−0.229	−3.117	0.002	0.052	0.280	26.29	< 0.001
Temporal lobe	−0.110	−1.584	0.115	0.012	0.359	37.78	< 0.001
Parietal lobe	−0.227	−3.088	0.002	0.051	0.281	26.35	< 0.001
Occipital lobe	−0.088	−1.205	0.230	0.008	0.282	26.51	< 0.001
Limbic lobe	−0.088	−1.252	0.213	0.008	0.333	33.64	< 0.001
Subcortical	−0.089	−1.262	0.209	0.008	0.336	34.14	< 0.001
White matter raw
Frontal lobe	0.194	2.451	0.016	0.037	0.187	15.05	< 0.001
Parietal lobe	0.214	2.808	0.006	0.046	0.244	21.15	< 0.001
Occipital lobe	0.173	2.340	0.021	0.030	0.285	26.06	< 0.001
Temporal lobe	0.195	2.594	0.011	0.038	0.260	23.06	< 0.001

Model: tissue volume = b0 + b1(gender) + b2[log(age)].