Table 1.

Summary of mean diffusion metrics by individual white matter tract. In this case, the p-value measures the likelihood that the magnitude of difference (or greater) between the normal and abnormal language populations might be observed if the null hypothesis was true (adjusted for multiple comparisons).

Variable	Normal language (N = 21)		Abnormal language (N = 12)		p-Value
		Mean	Standard dev	Mean		Standard dev
Age (years)	11.33333	4.31663	8.75	5.61046	>0.99
CC_MD	0.00087	0.00008	0.00089	0.00007	>0.99
CC_FA	0.60851	0.04542	0.55348	0.08094	0.3105
Left CSP_MD	0.00077	0.00003	0.0008	0.00004	0.4669
Left CSP_FA	0.59926	0.03842	0.57653	0.05007	>0.99
Right CSP_MD	0.00076	0.00003	0.0008	0.00005	0.9959
Right CSP_FA	0.5975	0.04471	0.59278	0.05036	>0.99
Left AF_MD	0.00079	0.00005	0.00099	0.00009	<0.0023
Left AF_FA	0.50591	0.03796	0.40714	0.1173	<0.0023
Right AF_MD	0.00079	0.00004	0.0009	0.00011	0.3726
Right AF_FA	0.495	0.03288	0.40814	0.1074	0.6072
Left ILF_MD	0.00089	0.00008	0.00093	0.00009	>0.99
Left ILF_FA	0.48974	0.05185	0.42366	0.08636	0.0483
Right ILF_MD	0.00086	0.00007	0.00093	0.00009	0.4232
Right ILF_FA	0.47922	0.06934	0.43784	0.06716	>0.99
Left IFOF_MD	0.00082	0.00004	0.00108	0.00018	<0.0023
Left IFOF_FA	0.5756	0.03127	0.40371	0.09905	<0.0023
Right IFOF_MD	0.00085	0.00005	0.0009	0.0001	>0.99
Right IFOF_FA	0.53205	0.05223	0.48369	0.07525	>0.99
Left UF_MD	0.00086	0.00004	0.00098	0.00005	<0.0023
Left UF_FA	0.50771	0.03591	0.36668	0.06277	<0.0023
Right UF_MD	0.00087	0.00007	0.00095	0.00009	0.1449
Right UF_FA	0.48541	0.03813	0.4632	0.04536	>0.99

MD: mean diffusivity (units of 10⁻³ mm² s⁻¹); FA: fractional anisotropy; CC: corpus callosum; CSP: corticospinal tract; AF: arcuate fasciculus; ILF: inferior longitudinal fasciculus; IFOF: inferior fronto-occipital fasciculus; UF: uncinate fasciculus.