. 2013 Jun 13;24(11):2964–2980. doi: 10.1093/cercor/bht152

Table 2.

Summary of results from multiple regressions investigating relation between age, ROI size, and tract measures controlling for motion in the entire sample (N = 35)

	RILF					LILF					RIFOF					LIFOF
	F	P	r² change	P_Age	P_{ROI size}	F	P	r² change	P_Age	P_{ROI size}	F	P	r² change	P_Age	P_{ROI size}	F	P	r² change	P_Age	P_{ROI size}
Non-normalized volume
FFA	8.6	<0.001	0.42	<0.008	<0.008	6.4	<0.001	0.41	<0.001	ns	1.3	ns				0.5	ns
OFA	5.0	<0.001	0.28	<0.005	ns	6.3	<0.001	0.41	<0.001	ns	1.3	ns				0.5	ns	0.5	ns	0.5
PPA	4.9	<0.005	0.28	<0.005	ns	8.3	<0.001	0.48	<0.001	<0.05	1.1	ns				0.4	ns
Normalized volume
FFA	6.6	<0.001	0.39	<0.025	<0.01	4.7	<0.005	0.34	<0.005	ns	1.2	ns				0.4	ns
OFA	4.2	<0.01	0.28	<0.01	ns	4.3	<0.008	0.32	<0.005	ns	1.2	ns				0.4	ns
PPA	3.7	<0.025	0.25	<0.005	ns	5.5	<0.005	0.38	<0.005	ns	1.0	ns				0.2	ns
Microstructural indices
FFA
FA	1.8	ns				0.9	ns				2.3	ns				1.3	ns
MD	6.2	<0.001	0.28	<0.025	ns	3.1	<0.05	0.26	<0.01	ns	3.4	<0.025	0.12	<0.05	ns	3.1	<0.05	.26	<0.01	ns
RD	7.4	<0.001	0.26	<0.025	ns	3.9	<0.025	0.25	<0.01	ns	3.7	<0.025	0.16	<0.05	ns	3.9	<0.025	.25	<0.01	ns
OFA
FA	1.6	ns				0.8	ns				2.2	ns				1.4	ns
MD	4.6	<0.005	0.21	<0.008	ns	3.1	<0.05	0.26	<0.005	ns	3.4	<0.025	0.11	ns	ns	1.1	ns
RD	6.1	<0.001	0.21	<0.008	ns	4.1	<0.01	0.25	<0.005	ns	3.8	<0.025	0.17	<0.05	ns	2.0	ns
PPA
FA	2.1	ns				1.0	ns				2.3	ns				0.8	ns
MD	4.6	<0.005	0.21	<0.008	ns	3.0	<0.05	0.25	<0.005	ns	3.4	<0.025	0.11	ns	ns	1.2	ns
RD	6.4	<0.001	0.23	<0.01	ns	3.8	<0.025	0.24	<0.008	ns	3.8	<0.025	0.17	<0.05	ns	1.2	ns

Note: Full model for each regression included 2 motion factors, age, and ROI size with the following degrees of freedom (4, 29). r² change represents the additional variance accounted for in the model by the factors of interest (age, ROI size) after accounting for motion in both the y- and z-directions. In addition, regressions were all run within the hemisphere (e.g., the size of right FG ROI predicting the volume of right ILF). Bold P-values represent those that survived the Bonferroni correction of P < 0.008.

ILF: inferior longitudinal fasciculus; IFOF: inferior fronto-occipital fasciculus; FA: fractional anisotropy; FFA: fusiform face areas; OFA: occipital face area; PPA: parahippocampal place area; MD: mean diffusivity; RD: radial diffusivity.