Table 1.

Fractional anisotropy (FA) measures (arbitrary values).^e

Brain region	CONT		ID			P-value
	PND 32	PND 61	PND 32	PND 61	SEM	Diet	Day	Diet × day
Caudate	0.340	0.344	0.327	0.339	0.00454	0.04	0.06	0.37
Cerebellum	0.192	0.211	0.178	0.199	0.00397	<0.01	<0.001	0.79
Corpus callosum	0.299	0.334	0.292	0.327	0.00440	0.16	<0.001	0.85
Internal capsule	0.433	0.456	0.421	0.450	0.00356	0.04	<0.001	0.21
Left cortex	0.321b	0.341d	0.317a	0.333c	0.00144	<0.01	<0.001	0.03
Left hippocampus	0.304	0.301	0.306	0.298	0.00515	0.91	0.19	0.43
Right cortex	0.333a,b	0.347c	0.330a	0.337b	0.00234	0.01	<0.001	0.05
Right hippocampus	0.300	0.302	0.292	0.305	0.00569	0.69	0.13	0.25
Thalamus	0.319	0.321	0.311	0.315	0.00542	0.14	0.58	0.87
Whole brain (from FA)f	0.317a	0.340c	0.315a	0.328b	0.00146	<0.001	<0.001	<0.001
Whole brain (from T1 scan)g	0.319a	0.339c	0.316a	0.329b	0.00148	<0.01	<0.001	0.01

CONT, control; ID, iron deficient; PND, postnatal day; FA, fractional anisotropy.

^a,b,c,dMeans in a row without a common superscript letter differ, P < 0.05.

^eData presented as mean and pooled standard error of the means (SEM) for each dietary treatment group. Main effects of dietary treatment (Diet; CONT vs ID) and postnatal MRI day (Day; PND 32 vs 61) and the interaction between Diet and Day are presented.

^fWhole brain FA values were generated from FA diffusion masks with a threshold of 0.15 to ensure only white matter was measured.

^gWhole brain FA values were generated from T₁-weighted white matter segmentation that was applied to the diffusion data.